Environmental Awareness

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Environmental Awareness

• Challenge for Humanity

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Interdependence of Earths Living and Non-living
Systems

• Our planet consists of a great variety of living
  and non-living systems related through the
  environmental changes.
• Changing any part of the natural environment can
  cause dramatic effects on other parts of the
  environment.

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Pollution

• Pollution is the concentration of any material or
  energy form that is ultimately harmful to humans.
• Pollution is classified as either
• Ground pollution
• Air pollution
• Water pollution

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Land Pollution

• Solid wastes include garbage, refuse, sludge
  products from agriculture, forestry, and mining
  that all can pollute the land.
• These wastes are disposed by burying them in
  sanitary landfills.
• Hazardous wastes are those that are potentially
  dangerous to humans.
• Soil erosion from overgrazing, deforestation,
  irrigation and cultivation can disturb the
  balance between living things and the soil.

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Water Pollution

• Water pollution is anything that makes the water
  unfit, harmful or undesirable for use.
• Types of pollutants
• Organic pollution sewage
• Inorganic pollution biodegradable
• Thermal pollution - heat
• Radioactive substances
• Abnormal concentration of organisms
• Aerobic and anaerobic bacteria
• Eutrophication increased phosphates and
  nitrates provide nutrients for increased algae
  growth.
• Concentration of pollutants

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Water Pollution
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Air Pollution

• Air pollution is the release of harmful materials
  into the atmosphere.
• Problems associated with air pollution include
• Health problems
• Acid rain
• Ozone depletion
• Global warming
• Pollutants are either gases or particulates (tiny
  solids suspended in the air)

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Acid Rain

• Acid rain (acid precipitation) is rain or snow
  that is more acidic than normal precipitation.
• Acid rain is largely produced by burning fossil
  fuels (putting CO2 into the air).
• Acid rain kills plants, fish, and damaged
  buildings.