Briefly introductionBriefly introduction

It took the steely It took the steely determination and determination and perseverance of one perseverance of one individual to arouse and individual to arouse and unite the passions of nearly unite the passions of nearly 20 million Americans that 20 million Americans that culminated into the creation culminated into the creation of Earth Day. More of Earth Day. More importantly, it finally put importantly, it finally put the need to urgently the need to urgently harness and limit harness and limit environmental decadence, environmental decadence, before things reached before things reached irreversible extents.irreversible extents.

The Earth’s Day “Prophet”The Earth’s Day “Prophet”

Gaylord Nelson, (June 4, 1916 – July 3, 2005) Senator Gaylord Nelson, (June 4, 1916 – July 3, 2005) Senator of Wisconsin, is the principal founder of Earth Day. of Wisconsin, is the principal founder of Earth Day. He managed to rip off the blindfolds of politicians, He managed to rip off the blindfolds of politicians, forcing them to see how the earth was needed forcing them to see how the earth was needed immediate help to recuperate after being made immediate help to recuperate after being made subject to industrial rape everyday.subject to industrial rape everyday.

11stst demonstration demonstrationThe first demonstration took place The first demonstration took place

on April 22, 1970, sponsored by on April 22, 1970, sponsored by Senator Gaylord Nelson and Senator Gaylord Nelson and environmental activist, to environmental activist, to create an environmental create an environmental agency. In this competition agency. In this competition there were two thousand there were two thousand universities, ten thousand universities, ten thousand primary and secondary schools, primary and secondary schools, and hundreds of communities. and hundreds of communities. Social pressure had its Social pressure had its achievements and the U.S. achievements and the U.S. government created the government created the Environmental Protection Environmental Protection Agency (EPA) and a series of Agency (EPA) and a series of laws designed to protect the laws designed to protect the environment.environment.

Earth SummitEarth Summit

In 1972, it was held the first In 1972, it was held the first international conference international conference on the environment: the on the environment: the Earth Summit in Earth Summit in Stockholm, which aimed Stockholm, which aimed to raise awareness to raise awareness among world leaders on among world leaders on the magnitude of the magnitude of environmental problems. environmental problems. So this day is celebrated So this day is celebrated world wide.world wide.

Only one day?Only one day?

Shouldn’t it be all Shouldn’t it be all the year? the year? Advances in Advances in technology technology nowadays are nowadays are trying to get our trying to get our necessities necessities satisfied, but satisfied, but without harming without harming the environment.the environment.

RENEWABLE ENERGYRENEWABLE ENERGY

Renewable energy is an energy which comes Renewable energy is an energy which comes from natural resources such from natural resources such as sunlight, wind, rain, tides, and geothermal as sunlight, wind, rain, tides, and geothermal heat.heat.

Wind PowerWind Power

Wind power is the Wind power is the conversion of wind conversion of wind into a useful form of into a useful form of energyenergy..

Example:Example:

HydropowerHydropower

Hydropower or water Hydropower or water power is power derivpower is power derived from ed from the energy of falling the energy of falling water.water.

Example:Example:

Solar energySolar energy

Solar energy is the energy the sun Solar energy is the energy the sun creates, which can be creates, which can be transformed into a useful form of transformed into a useful form of energy.energy.

There are two types: Photovoltaic There are two types: Photovoltaic (PV) and Solar thermal energy (PV) and Solar thermal energy (STE). (STE).

Photovoltaic (PV)Photovoltaic (PV)Photovoltaic is a method Photovoltaic is a method for generating electric for generating electric power by using solar power by using solar cells to convert energy cells to convert energy from the sun into a flow from the sun into a flow of electrons. of electrons.

Photovoltaic power Photovoltaic power generation employs generation employs solar panels composed solar panels composed of a number of solar of a number of solar cells.cells.

The first practical The first practical application of application of photovoltaic was to photovoltaic was to power orbiting satellites power orbiting satellites and other spacecraft.and other spacecraft.

Solar thermal energy (STE)Solar thermal energy (STE)

Solar thermal energy is a Solar thermal energy is a technology for technology for transforming solar energy transforming solar energy into thermal energy into thermal energy (heat).(heat).

Geothermal energyGeothermal energy

Geothermal energy is heat Geothermal energy is heat from within the Earth. We from within the Earth. We can recover this heat as can recover this heat as steam or hot water and steam or hot water and use it to heat buildings or use it to heat buildings or generate electricity.generate electricity.

Naturally occurring areas of Naturally occurring areas of hydrothermal resources hydrothermal resources are called geothermal are called geothermal reservoirs. Most of them reservoirs. Most of them are deep underground with are deep underground with no visible clues showing no visible clues showing above ground. above ground.

Example:Example:

Volcanoes and fumaroles, hot springs and geysers.Volcanoes and fumaroles, hot springs and geysers.

Biomass energyBiomass energy

Biomass is organic Biomass is organic material made from material made from plants and animals plants and animals (microorganisms). (microorganisms). Biomass contains stored Biomass contains stored energy from the sun energy from the sun that can be converted that can be converted to other useable forms to other useable forms of energy, such as of energy, such as methane gas or methane gas or transportation fuels.transportation fuels.

Example:Example:

EnvironmentalEnvironmental friendly friendly technologytechnology

Technology is one of the things that helps us, but at Technology is one of the things that helps us, but at the same time one which affects most the the same time one which affects most the environment. So Inventors don’t waste time environment. So Inventors don’t waste time putting their ideas in the service of the planet, putting their ideas in the service of the planet, taking them from imagination to reality. Green taking them from imagination to reality. Green inventions were born to change our lives and save inventions were born to change our lives and save our environment. This are a class of electronic our environment. This are a class of electronic devices that can promote sustainable devices that can promote sustainable management of resources, which means to management of resources, which means to contribute to the environmental sustainability.contribute to the environmental sustainability.