environmental science. what are our main environmental problems?
TRANSCRIPT
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Environmental Science
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What are Our Main Environmental Problems?
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Resource Depletion
Natural Resource- natural material used by humans
1) Fresh Water 2) Air3) Soil4) Trees/ Wood5) Crops6) Energy from sun
Renewable Resource- resource that can be replaced relatively quickly
Resource are said to be depleted when a large fraction of the resource has been used up.
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Resource Depletion
Nonrenewable Resource- resource that forms at a much slower than the rate at which it is consumed
1)Mineral 2) Fossil Fuels (coal, natural gas, petroleum)3)Metals (iron, aluminum and copper)4)Salt5) Sad Clay
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Pollution
Pollution- Undesired change in air, water, or soil that negatively affects health, survival or activities of humans or other organisms
Types of Pollutants
Biodegradable- pollutants that can be broken down by natural processes (food waste, human sewage)
Nondegradable- pollutants that cannot be broken down by natural process (mercury, lead, some plastic)
Because nondegradable do not break down well, they can build to dangerous levels in our environment
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Loss of Biodiversity
Biodiversity- refers to the number and variety of species that live in the area
Since the Permian period (250 million years ago) 95% of all species became extinct
Why should we be concerned about extinction of species?
1) Species can be considered a natural resource* food* oxygen
2) Economic, ecological, scientific, recreational value
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Something to think about… With the person sitting next to you,
discuss any connection that you may have with either a non renewable recourse or a renewable recourse. Think of things that you are wearing, that are in the classroom, that are found at home, or that are found outside.
Example: When I drive a car I am consuming gas which is petroleum/oil. This is a nonrenewable resource