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  • 8/8/2019 Environmental on Line IV Sem

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    UNIT - I

    Question

    The gas that absorbs the infrared radidtion is

    Which among the following countries belongs to the poorest ten countries of the world ?

    The mechanism by which homeostasis of nature works through

    The areas where civilization reached glorious heights lie in the latitudes

    The person who is associated with the definition of sustainable development is

    The life supporting environment is a thin layer extending up to

    Agricultural revolution occurred about

    Industrial revolution took place during

    Industrial revolution took place in

    The person known as Father of Industrial revolution

    Presently the annual population growth is

    Ancient civilization like those of Greeks, Mayans, Incas, Romans, Sumerian, Indus Valley and Egyptian collapsed due to

    Modern environmental movement has taken place because of

    Earth summit conference was held in

    Conference on Human Environment was held at

    The approximate number of recognized cultures in the world is

    The number of languages in the world is

    One of the nations having the highest cultural diversities and highest bio diversities is

    The science dealing with organisms and their inter relationship with their environment is known as

    The term ecology was first introduced by

    Man made environment is called

    Material cycles go through

    A forest is a complex community with

    Closed canopy forests are those, where the tree crowns cover more than

    The extent of tropical moist deciduous forest cover in India is more than

    Which of the following is a non - renewable resource ?

    Deforestation takes place in mountain region due to

    The most severe impact of deforestation is

    Social forestry is one where

    Deforestation affects

    Narmada Bachao andolan is headed byChipko movement was started in khejari village in Jodhpur by

    Forest protection campaign started in Karnataka is known as

    Forests are

    The pecentage of earth covered by water is

    Residence time of snow is

    Residence time of water in the atmosphere is

    Maximum residence time of water in revers is

    Maximum density of water occurs at a temperature of

    The largest fresh water lake in the world isThe largest river with the greatest discharge is

    Water rich country is

    Water poor country is

    Cauvery water dispute is between

    Mulla Periyar Water Dispute is between

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    The outer 16km zone of lithosphere comprises of 8 elements, of which the greatest percentage is due to

    The thickness of the crust under oceans is

    The one constituent which is uncommon in most of the rocks is

    Metals have the following properties except one of them

    Strategic metals and minerals are

    In India one of the following fuel resources is most abundant

    Environmental impact is greatest in the case of mining and processing

    The food item which is rated as the essential for nutrition is

    One of the following is not a nutrition deficiency disease. That is

    One of the problems is not due to industrial agriculture. It is

    Of the states given below, one has least deposit of lignite. The state is

    Rural energy source in India is

    Largest production of hydro electricity is carried out in

    Nuclear energy often causes

    Installed capacity of Hydel energy in India is

    Percentage of thermal power generation in India is

    Power generation by the following mode is least polluting

    Fossil fuels are

    Energy and manure are generated by

    Power generation by which of the following is least polluting

    The soil required for healthy and vigorous growth of most of the plants is

    Soil comprises of

    Which of the following is most important in order to make the soil most effective

    Soil erosion can be prevented by

    Which of the phenomenon mentioned below is the most serious on that degrades the soil in India

    Biological method of soil conservation is

    Process in which soil is conserved is

    Extensive planting of trees to increase green cover is called

    UNIT - II

    Question

    In living organism, which is the most likely combination of elements

    In an aquatic ecosystem, the third tropic level comprises of

    In a grassland ecosystem, the second trophic level is occupied byThe topmost function of an ecosystem is

    The most abundant element in human body is

    The most abundant element in ecosphere is

    Which among the following roles played by photosynthesis in glucose production is not appropriate ?

    Generally the percentage of food eaten by a consumer into its body tissue is

    The gas released by producers is

    The over all efficiency of natural ecosystems is

    The quantity of oxygen in the atomosphere is

    If the oxygen level drops by 8% of the oxygen, then the effect on humans shall beOxygen pool has accumulated due to

    The total percentage of carbon located in biosphere is

    Nitrogen fixation is done by the bacteria

    Global cycling of carbon, nitrogen and sulphur is different from photosynthesis in that

    Total yearly sulphur emission from anthropogenic sources

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Which one of the following is an abiotic component of the ecosystem?

    An ecosystem comprises of

    Which one of the following does not exist?

    Which one of the following has relation with soil effect?

    A community that starts the process of succession in a habitat is called

    Nudation is related to which of the following succession

    A primary succession on bare rock starts with

    Woodland stage is a stage that occurs in the process of

    The most stable ecosystem is

    Which of the food chain in correct

    Which one is the correct chain?

    If in a grass - > deer- >tiger, food chain, the biomass of grass is 1 tonne. Then the tiger biomass of tiger will be

    In a food chain animals constitute the

    The food chain in which microorganisms that breakdown dead matter is called

    The concept of ecological pyramids was itroduced by

    Which ecological pyramid is always upright ?

    The most reliable pyramid is

    Which pyramid is always an upright one?

    Tundra biome occurs in

    Boreal forests occur in the latitude of

    Trees like pine, hemlock, cedar and fir and found in

    Teak, Oak and maple trees occur

    Which of the following belong to grassland?

    Topical forests occur in India in

    Deserts are the biomes where

    The animal black buck is found in

    Biodiversity is defined as

    The largest number of species belongs to

    If all vegetation on earth is wiped out all animals shall die due to lack of

    The great Indian Bustard has become endangered species due to

    The forest cover in India in percentage of land is

    The taxononomic group which has the largest number is

    The number of genes in rice ranges fromOf the various types of diversities given below, which one does not match with the other three?

    Which one of the following does not belong to the category "key stone species"

    Which one of the following 4 seasons gives plentiful of rainfall in the west coast

    Wet zone in India has an annual rain fall of about

    Indo Gangetic plains spread over Punjab, Haryana, UP, Bihar, West Bengal have the following soil

    Lateritic soils are found in

    Alpine vegetation is found in

    Which one of the following belongs to the intrinsic value of biodiversity

    Which one of the following belongs to instrumental value of biodiversityWhich one of the following is used as anticancer drug

    The extract of poppy seed is used as

    Which one of the properties is consumptive use

    The crops which first grew in India and spreas throughout the world is

    The animal that has become extinct recently is

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    The area earmarked for conservation for all types of wild life is called

    Number of unknown species according to UNEP is

    The national park earmarked for protection of Rhinoceros is

    Eravikulam national park is famous for

    Which is the correct combination

    Animals having high protection prospects are

    Which group of vertebrates have the highest number of endangered species

    According to Myers, the approximate number of plant species having edible parts and can be brought into cultivation is

    Among the countries rich in plants and mammals, the rank of India is

    Among the 34 biodiversity Hotspots identified in the world, India has

    The animal that has been saved from extinction is

    The largest number of threatened animal species

    Endemic species are mostly

    Which one of the following is not an in-situ conservation

    In India there are

    Largest national park in India is

    Ex-situ conservation locations are

    Which is the animal/bird which has become extinct?

    The largest number of species, which are endemic to India, belongs to

    In situ conservation means

    Of the potential biosphere reserves identified the largest in extent is

    The largest wild life sanctuary in India is

    Which among the following is the largest bird sanctuary?

    UNIT - III

    Question

    The most important indoor air pollutant is

    Damage to leaf structure by air pollutants causes

    Air pollutants mixing up with rain

    Industrial wastes may contoin toxic

    Dissolved oxygen in water comes from

    Itai Itai disease in Japan was caused by consumption of rice contaminated with

    Thermal pollution can be controlled by

    Oil in water afects fish by affectingWhch of the following have more penetration power

    Bhopal gas tragedy occurred due to leakage of

    Which of the following enhance the frequency of earthquake

    The point where first movement occurs during earthquake is called

    Blue Baby Syndrome is caused by the presence of ---- in drinking water

    Minamate disease occurred due to consumption of fish contaminated with

    Power plant utilize only ----- of the energy provided by fossil fuel for their operation

    Sound frequency is expressed in

    As per Environmental protection rules, 1999 the permissible noise levels for fire-crackers are---- dbThe unpleasant & unwanted sound is called

    Air pollutants affects plants by entering through

    CO has affinity for haemoglobin ---- times more than oxygen

    The most important indoor air pollutant is

    Excess of ---- in drinking water causes defects in teeth & bones called fluorosis

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    People in Andhra Pradesh suffered from various abnormalities due to consumption of ---- contaminated cashew nuts

    Pollution by heavy metal Cadmium had caused the disease called

    The process by which the concentration of toxic substances builds up at successive levels of food chain are called

    The process by which the substances tend to accumulate in the organism's body is called

    Excess of heat reaching water bodies causes ----- pollution of water

    The urban solid waste materials that can be degraded by micro-organisms are called

    Earthquake generated water waves are called

    Tropical cyclones are called

    Peroxyacetyl nitrate is an eg for

    A housewife using wood as fuel for cooking inhales BAP equivalent to ---- packets of cigarette a day

    Noise can cause temperory / permanent hearing loss and it depends on ---- of sound level

    The single largest source of air pollution in Calcutta is

    Bhopal gas tragedy in 1984 was caused by

    SO2 is

    Atmospheric pollutants from volcanic eruptions affect

    Thermal pollution

    When solid waste does not pose a threat to the environment or to human health it is classified as

    Municipalities, industries and agriculture are all sources of

    Which of the following does not cause water pollution

    Noise can be measured in

    Which one of the chemical element is most frequently used to purify water

    When a water source is used faster than it can be replaced, it is said to be

    Which noise can be tolerated by human ear?

    The Sound beyond which of the following level can be regarded as a pollutant.

    Major ill effects of Noise pollution is

    Nuclear waste comes from all of the following sources except

    Highly flammable, corrosive, reactive or toxic wastes are considered

    Cesium (Ce137) and Strontium (Sr90) are

    When solid waste does not pose a threat to the environment or to human health it is classified as

    A major burden of air pollution is carried by

    Which among the following is a secondary pollutant?

    The single largest source of air pollution in Calcutta is

    Air pressure is measured with aWhich of the following does not cause water pollution

    Most poisonous pollutant in water is

    Lead in water can cause

    The tropical cyclones move like a spinning top at the speed of ------ km/hr

    Wooden houses are preferred in earthquake prone areas as in

    UNIT-IV

    Question

    "The limits of Growth" was written by

    Which one of the following is not associated with reducing the run-off loss of waterRain water harvesting has the following advantages

    Rajendra Singh of "Tarun Bharat Sangh" was awarded Magsaysay Award for his work on

    In Sardor Sarovar project displacement of about 3 lakh people occurred due to

    Which one of the following gases has maximum contribution to enhanced greenhouse effect

    Cattle,Sheep and termities are responsible for the release of the following greenhouse gas

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    The most important agentas for ozone depletion are

    Maximum depletion of ozone occurs on

    Chernobyl disaster is associated with

    As per the Forest Act, cultivation of which of the following is a non-forest activity

    Which of the following NGO's is associated with 'Chipko Movement'

    The sensitizing issue of pesticide contamination of cola drinks was brought into limelight by the NGO

    The concept of sustainable development was given by

    The 3 R approach of resource use stands for reduse, reuse & -----

    The land are from which water drains under gravity to a common drainage channel is called a

    Average global temperature is 15C. In the absence of greenhouse gases the temperature would have been

    In acid rain the pH of rain water falls below

    The atmospheric emissions of NO2 & ---- cause acid rains

    Ozone layer acts as a natural sunscreen which protects kife on this earth against --- rays

    Ozone concentration is measured in --- units

    Ozone depleting nature of CFC's was first reported by

    The World Environment day is celebrated on

    The first country in the world to make provisions for environmental protection in its constitution is

    Environmental Protection Act came into force on 1986, the birth anniversary of Smt.IG

    Noise has been included as pollution in the air (prevention & control) act, 1981 in the year

    Due to nuclear fallout, a phenomenon opposite to global warming is expected which is known as

    Crystals of Ca & MgSO4 are formed as a result of corrosion caused by

    Troposphere traps heat by a natural process due to presence of certain gases & such effect is called

    In case of global warming, CO2 concentration in the atmosphere was 355 ppm in 1990 increasing at a rate of --- ppm every year

    By photolytic decomposition UV radiations less than --- nm decompose molecular oxygen into atomic oxygen

    The modern fusion bombs are of the explosive force of ---- kilotons & ---- megatons

    Economically unproductive lands suffering from environmental deterioration are known as

    The average global temperature appears to have risen between --- & ------

    Acid rain is measured using a scale called

    The main cause of the hole in the ozone layer is due to

    Watershed management was adopted in 1949 by----

    The process of saving water for future utilization is known as

    The most common method of rain water harvesting is

    The progressive warming up of the earth's surface due to CO2 in the atmosphere is calledOther names of acid rain is

    CFC release more amount of

    The main source of BFC is

    The major source of CFC is

    Watershed otherwise called as

    To maintain essential ecological process & life supporting system is main objectives of

    To prevent hazards to all living creatures & protects is main objectives of

    The management of rainfall & resultant runoff is called

    The taj mahal in agra suffering at present due to ---- & ---- acidOzone is present in ----

    1 Dobson unit is equivalent to -----

    Due to nuclear explosions, a process known as opposite to global warming will occur is called ---

    About 20% of the geographical area of India is ---

    Which gas contributes to the global warming

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    As a result of glacial melting & thermal expansion of the ocean ---- cm life is expected in sea level by 2030

    The enhanced green house effect is called

    The e-waste contains --- chemicals which are toxic & cause environmental pollution

    In continuous leaching ---- to --- cm water is required to remove 90% of soluble salts

    The accident occurs, when the workers were putting uranyl nitrate solution containing about --- kg of uranium

    Ozone is present in between ---- to ----- km

    UNIT - V

    Question

    The present world polpulation has just crossed

    If a nation has an annual growth rate of 2%, its polpulation will double in

    Every---- person in this world is an indian

    Which state in India has the lowest birth rate

    Chemicals or agents that can cause cancer are called

    In Vienna World conference on Human Rights,1993 emphasis was laid for developing countries on

    Declaration of Human Rights and Environment was drafted by UN at

    HIV can pass from infected persons to others by

    UN decade for women has been during

    CEDAW deals with

    ENVIS generates database on

    GIS stands for

    Universal Declaration of Human Rights was given by the UNO in the year

    When a population increases by a fixed percentage it is called----growth

    When a quantity increases by a constant amount per unit time is called

    AIDS was discovered in the year

    HIV has spread through---vaccine in New York,Los Angeles & San Francisco

    HIV has spread in Africa through----- vaccine prepared by using monkey's kidney

    HIV has spread through ----- vaccine programme of Africa

    Childhood cancer rates are also increasing by ---- % every year

    The declaration of principles of Human Rights & the environment has drafted on

    Chemical factors may cause harmful changes in the body's conditions called

    The unprecedented growth of human population at an alarming rate is reffered to as

    WBC, responsible in the formation of anti-bodies are called

    The enormous increase in population due to low death rate & high birth rate is termed asThe chemical factors which cause changes in body's conditions are called

    CFC mainly damage ozone layer, it allows more UV rays & cause

    Pesticides like DDT & Chlorinated pesticides may affect

    The results of HIV are confirmed using a second test called

    Increase of life expectancy is another important reason for

    The most commonly used initial test for HIV is

    Multimedia Digital content Manager in the form of

    Europe & North america accounts for ----% of world's population

    In ----, India started the family planning programme.Cough & TB for more than 6 months is a symptoms of

    Persistent cough for more than one month is a symptom of

    10% of body weight get reduced within a short period is a symptoms of--

    India ranks --- in the world with 5.1 million HIV / AIDS affected people

    Which one of the following methods of imparting value education

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Slowing down the population explosion by reducing the ----

    Td = 70 / r formula is used to calculate

    The enormous increase in population due to low mortality and high

    Which of the following is a problem not associated with population growth

    The major cause of global population growth in the 18th and 19th centuries was

    Population pyramids are useful to

    HIV can pass from infected persons to others by

    Which state in India has the lowest birth rate?

    HIV/AIDS is:

    HIV/AIDS is:

    HIV can:

    The HIV/AIDS pandemic has evolved

    The number of live births per 1,000 people in a population in a year is known as ___.

    The nation with a "one family-one child" is _

    The method used to gather information about an object without actually coming in contact with

    Due to application of ----- field drugs and its replacement can be administered efficiently

    Which of the following is not associated withenvironment education

    Interpretations of polluted zones, degraded lands can be made based on

    Which of the following is used to check unplanned growth

    ENVIS functions among ----- centres all over the country

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Answer

    Carbon monoxide

    Tanzania

    Positive and negative feedback loops

    25 and 35

    Gro Harlem Brundtland

    15km in the atmosphere and 11km beneath the ocean surface

    10,000years ago

    17th and 18th centuries

    England

    James Watt

    85 million people

    Environmental degradation

    Rachel Carson

    Rio - de - Janeiro

    Stockholm

    6000

    5800

    Philippines

    Ecology

    Haeckel

    Anthropogenic environment

    All the four spheres

    Trees, shrubs and plants - Trees, mammals and birds - Birds soil fauna and birds

    20% of the ground

    30%

    Coal

    Hydel projects and road construction

    Loss of biodiversity

    Public lands, sides of roads, canals and railways are afforested

    Rainfall

    Medha Phatkar

    Amrita Devi

    Appico movement

    Renewable resources

    71%

    1year

    10days

    30days

    4 C

    Lake superior

    River Nile

    Gabon

    Singapore

    Karnataka and Tamil Nadu

    Kerala and Tamil Nadu

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Oxygen

    8 to 15 km

    Sodium chloride

    Crystalline

    Those in short supply - Not produced in abundance - Metals/needed for economic and defence requirement

    Lignite

    Coal

    Fruits and vegetables

    Plague

    Soil erosion

    Kerala and Tamile Nadu

    Wood and animal dung

    Canada

    Thermal pollution

    24,000MW

    67%

    Hydro energy

    Non - renewable resources

    Biogas plants

    Natural gas

    Loam

    Sand, silt, clay and humus

    Nutrient holding capacity

    Afforestation

    Water erosion

    Gulley control

    Soil is protected against loss

    Afforestation

    Answer

    Carbon, hydrogen, oxygen, nitrogen, phosphorus

    Crustacean

    Herbivores

    Primary production of food

    Oxygen

    Oxygen

    Producing oxygen and water

    10%

    Oxygen

    0.1 to 2.0%

    21%

    There will be trouble in breathing

    Withdrawal of carbon from biogeochemical cycle

    1%

    Rhizobium

    It does not from volatile compounds

    is equal to that of natural processess

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Humus

    Producers, consumers, decomposers and abiotic factors

    Tertiary succession

    Edaphic climaxes

    Pioneer community

    Primary succession

    Lichens

    Aquatic succession

    Ocean

    Grass- >grasshoppers- >lizards- > fox

    Phytoplankton- >zooplankton- >fish

    10kg

    Intermediate tropic level

    Detritus food chain

    Charles Elton

    Pyramid of energy

    Pyramid of energy

    Pyramid of energy

    Arctic zone

    45 to 60 degree N

    Boreal forest

    Temperate deciduous

    African veldt

    Kerala and assam

    Temperature variation is from 0 to 50 and at middle latitudes

    Thar Desert

    Variety and variability among living organisms

    Insects

    Oxygen

    Hunters

    19%

    Insects

    32000-50000

    Beta diversity

    Musk deer

    Season from mid June to mid September

    More than 200cm

    Alluvial soil

    Kerala

    Himalayas

    For aesthetic and scientific functions

    Agricultural use

    Vinblastine

    Analgesic

    Providing vegetable

    Mango

    Dodo

    Ch d M h

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    National park

    13.6 million

    Kaziranga national park

    Nilgiri tahr

    Gir-lion

    Bear and musk deer

    Mammals80000

    Tenth

    2

    Golden tamarin

    Insects

    Confined to a particular locality

    Sacred forest

    39 national parks and 492 wild life sanctuaries

    Desert national park

    Botanical gardens

    Passenger pigeon

    Amphibians

    Conservation of species in their natural habitat

    Gulf of Mannar

    Nagarjuna sagar sanctuary, Andhra Pradesh

    Chilka lake bird sanctuary, Balagaon, Orissa

    Answer

    Radon gas

    Dead areas of leaf

    High acidity

    Chemicals, Phenols & Acids

    atmosphere

    Cadmium

    Cooling ponds, Spray ponds & Cooling tower

    Gills

    Gamma rays

    MIC

    Big Dams, Underground nuclear testing & Deep well disposal of liquid wastes

    Epicenter

    Nitrate

    Methyl mercury

    one-third

    Hertz &Cycles per second

    125

    Noise

    Stomata

    210

    Radon gas

    Fluoride

    ENVIRONMENTAL STUDIES Ch d M h 09CPBEME009

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Endosulphan

    Itai-Itai

    Biomagnification

    Bioaccumulation

    Thermal

    Biodegredation

    TsunamisHurricanes

    Tertiary pollutants

    20

    Intensity & Duration

    Jute mills

    Methyl isocyanate.

    released from coal burnings, a primary pollutant & causing asthma

    All living organisms worldwide

    Can kill off entire marine populationNon-hazardous waste

    Water pollution

    Natural, extremely deep underground aquifers

    DB

    Chlorine

    Nonrenewable

    80 decibels

    80 dB

    Hypertension

    Hair salons

    Hazardous

    Non-hazardous waste products

    Non-hazardous waste

    Troposphere

    Ozone

    Jute mills

    Barometer

    Natural, extremely deep underground aquifers

    Arsenic

    Kidney damage

    10 to 30

    Japan

    Answer

    Meadows et.al

    Avoids flooding of roads, Recharges ground water & Reduces run-off loss

    Water conservation

    Submergence of villages

    CO2

    Methane

    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    CFC

    south pole

    Nuclear accident

    tea

    Norwegian et.alRecycle

    watershed

    minus 18C

    5.6

    SO2

    UV

    Doboson

    Thomas Midgley

    June 5thIndia

    Nov 19th

    1987

    Nuclear winter

    acid rain

    Green House Effect

    1.5

    243

    500,10Wastelands

    1 & 2 F

    pH

    CFC

    Damodhar valley corporation

    Water conservation

    Root-top

    Green House Effect

    acid fog & acid decreaseChlorine

    Fire extinguishers

    refrigirants & Propellent

    Drainage basin

    Wild life protection act

    Environmental protection act

    watershed management

    SO2 & H2SO4

    Stratosphere0.01 mm

    Nuclear winter

    Wasteland

    CO2

    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

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    20

    global warming

    >1000

    0.5 to 1

    16.6

    10 to 50

    Answer

    6 billion

    35 years

    Sixth

    Kerala

    Carcinogenic

    Economic rights

    Geneva

    contaminated syringe1975-85

    Discrimination against women

    coastal ecology - biodiversity - occupational health

    Geographical Information System

    1948

    Exponential growth

    Exponential growth

    1983

    Hepatitis B viralHIV

    Small pox

    6

    May 16,1994

    Disease

    Human rights

    T-helper cells

    Population explosion

    diseaseSkin Cancer

    Food Chain

    Western Blot

    Population explosion

    ELISA

    CD-ROM

    14

    1952

    HIVHIV

    HIV

    2nd

    Telling

    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

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    ENVIRONMENTAL STUDIES Chandra Mohan 09CPBEME009

    Fertility

    Doubling time

    Population explosion

    Increase in per capita income

    Industrial revolution

    Express the age sex distribution of a population

    Contaminated SyringeKerala

    challenges facing 21st century. - an emergency of an unprecedented nature - global disaster and world population

    creating orphans - leading to increased child labour - reducing populations

    only enter the body through naturally moist places - penetrate broken skin

    in different ways - at varying speeds - in different parts of the world

    the crude birth rate

    China

    Remote sensing

    ITpoverty

    GIS

    GIS

    25