Environmental Sciences

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Environmental Sciences

• The study of natural processes in the environment
  and how humans can affect them.

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Environmental Issues Categories

• Resource Use
• Population Growth
• Pollution

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What are natural resources?

• Anything in the environment used by people

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Renewable Resources

• Renewable are always available or naturally
  replaced in a short time
• Examples Sunlight, Wind, Fresh Water and Trees

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Non-Renewable Resources

• Natural resources not replaced in a useful time
  frame
• Examples Oil (Petroleum), Coal and Plastic
  Products

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The Population Problem

• When population grows, demands for resources also
  grow
• The human population has been growing faster
  creating greater demands
• Shortages
• Food Supply, Water Supply (Water Conservation)

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Pollution

• The contamination of earths land, water or air.
  Can be caused by a variety of factors including
• Chemicals
• Waste
• Noise
• Heat
• Light

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Global Warming

• An increase in the earth's average atmospheric
  temperature that causes corresponding changes in
  climate and that may result from the greenhouse
  effect.
• Greenhouse Effect Build up of carbon dioxide in
  the atmosphere

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Causes of Global Warming

• Burning of Fossil Fuels
• Burning of Coal and Oil
• Burning of fuel from cars
• Burning from factories

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How does population affect the increase of CO2
buildup?

• Increase in Cars
• Increase in Factories to Produce Products

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What does an increase of CO2 do?

• Makes weather cooler in winter
• Makes summers hotter
• Lowers the relative humidity
• Assists with the increase of acid rain
• Harms the Ozone layer

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What are Hazardous Wastes?

• Hazardous wastes are substances that pose threats
  to health and environment.
• Used oil
• CFCc
• Old Batteries
• DDT

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Environmental risks

• Wastes are usually insoluble meaning they can not
  be dissolved or broken down.
• Those that are dissolved in water may turn into
  acid rain or pollute water sources

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Environmental Risks

• Wastes may enter storm drains and contaminate
• Surface water (lakes and streams)
• Soil and found water

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What are CFCs

• CFCs are compounds of chlorine hydrogen fluorine
  and carbon that when releases into the air, a
  chlorine ion causes a reaction with ozone (O3)
  and changes it into (O2) destroying the ozone and
  atmosphere

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QUIZ TIME!!!

• What is the best way to get rid of old used motor
  oil?

1. Put it in the garbage
2. Pour it down the drain
3. Take it to the recycle center
4. Pour it on the ground where it came from

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Quiz Answer

• C Take it to the recycle center

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What can WE do?

• The single most effective thing that we can all
  do is practice CONSERVATION
• Compost
• Recycle
• Save Water
• Save Energy (Unplug appliances, Turn lights off)

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Where are we headed?

• Wind Power
• Solar Power
• Alternative Fuel

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Weighing Costs vs. Benifits

• Drilling Oil in Antarctica Example
• Drilling for oil in Antarctica can harm living
  organisms, can be expensive for set up and
  transportation of oil ALTHOUGH benefits can be
  new supply of oil for heat, electricity and
  transportation, increase in supply of oil,
  decrease in oil price, and creation of new jobs.