Human Impact on the Environment Biology and Honors Biology.

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Presentation transcript:

Human Impact on the Environment Biology and Honors Biology

Population growth leads to Industrialization – Burning fossil fuels – Non-renewable resources – Pollution – Increased CO 2 levels

Acid Rain Burning of fossil fuels releases sulphates and nitrates into air Sulphates and nitrates mix with water vapor in air and form sulphuric acid and nitric acid

Acidification of lakes Lakes and ponds can become so acidified that no life can live in them!

Deforestation Population growth leads to the loss of natural habitats Cut down trees to build new homes Loss of biodiversity Loss of oxygen producers and CO 2 eliminators

Herbicides and Pesticides We spray pesticides and herbicides with out knowing the consequences DDT

Claimed to be a miracle No effect on humans Can build up in the environment – Biological magnification

Bioaccumulation Accumulated to such levels in top predators that it started having lethal effects. Endangered many species of birds, Including our Bald Eagles.

Ozone depletion In the ’80’s it became apparent that the ozone layer was disappearing It was confirmed that is was directly caused by human activity

CFC’s Carbon-Flouro-Carbons in aerosols were leaking into the atmosphere and eating away the ozone Freon is also a CFC

Pollution Water Pollution – Oil Spills – Gasoline spills – Gets into drinking water

Global Warming Increase in CO2 Increase in greenhouse effect Increase in global temperatures