interconnected planet ch6. environmental science – study of the impact of humans on the...
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Interconnected Planet
CH6
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• Environmental Science– Study of the impact of humans on the
environment
• Humans are a part of the environment and can affect the resilience of the environment.– Humans consume resources faster than they can
be replaced– Earth is an interconnected planet
• Pollution and habitat destruction destroy the resources we need to live, such as air, water, and food
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Fresh Kill’s Landfill in NY state Approximately 135 football fields
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Resources• Materials to be used for a need• Renewable– Can be replaced at the same rate at which they
are consumed, within our (human) lifetime– Hydro, Solar, Geothermal, Nuclear, Wind, Biofuels
• Nonrenewable– Used at a faster rate than can be replaced– Fossil Fuels are from the remains of organisms
that lived long ago– Oil, natural gas, coal
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Environmental Issues• Air Pollution– Industries, power plants, vehicles burning fossil
fuels• Releases carbon dioxide, sulfur dioxide, and nitrogen
oxides
– Acid Rain– Global Warming– Ozone Layer– Respiratory Issues
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Acid Rain• Precipitation that has a high concentration of
sulfuric or nitric acid (increase pH)• Harms forest and lakes
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Ozone Layer• Protects life on Earth
from the sun’s damaging ultraviolet (UV) rays
• Damaged due to chloroflurocarbons (CFCs) used in refrigerators, air conditioners, spray cans
• Reduction in CFC use has helped the Ozone
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Global Warming
• Gradual increase in the average global temperature
• Greenhouse effect– Warming of the surface and lower atmosphere of
the Earth– Occurs when particles in the atmosphere absorb
and trap heat on the planet
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Greenhouse Effect
• Naturally occurs• Keeps the Earth at comfortable temperature• Becomes a problem when particles in the
atmosphere build up trapping more heat on the planet
• Carbon Dioxide – Burning of fossil fuels
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• Global weather • Migration patterns• Ice sheets (sea level)
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Water Pollution
• Pollution– Any unwanted substance that contaminates the
material needed
• Fertilizers, pesticides, manure, industrial waste, oil runoff from roads, septic tanks, unlined landfills
• Water is renewable until polluted
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Soil Damage
• Soil Erosion– Destroys fertile soil that we need in order to
produce food
• Soil Conservation– Terracing, cover crop, crop rotation, contour
plowing– Reduce soil loss and conserve fertile soil
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Ecosystem Disruption
• Habitat Destruction• Loss of Biodiversity• Invasive species– Introduce non native organisms to an area– Competition for resources
• Extinction– Death of every member of a species
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Environmental Solutions
• Conservation– Protecting existing natural habitats
• Restoration– Cleaning up and restoring damaged habitats– Harder to put back to normal
• Reduce, Reuse, Recycle
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• Research and technology– Provide cleaner energy sources– Better ways to deal with waste– Improve methods for cleaning up pollution
• Environmental Awareness– Education– Advocacy, showing support for the cause
• Planning for the Future