Human Impact on the Environment

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Presentation transcript:

Human Impact on the Environment

Ways humans help…or try to Build nesting boxes for birds. This gives them an easy home that’s strong and protected so the predators can’t get them.

Ways humans help…or try to Reserves for animals By fencing off an area, we can keep predators out so a species can reproduce

Ways humans help…or try to Make laws to protect animals Laws against the hunting of endangered species as well as needing hunting licenses for other species

Ways humans don’t help

Population growth leads to Industrialization Burning fossil fuels Non-renewable resources Pollution Increased CO2 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 CO2 eliminators

Over-grazing Farmington, UT 1900’s. Overgrazing of the mountains above Farmington resulted in flash floods in the 1920’s.

Moving into the mountains Elk, deer and moose often suffer loss of habit due to humans building houses further up the mountains. These animals are forced to come down the mountain for food during the winter. Often that means that they’ll eat the farmers’ haystacks or flower beds.

Ozone depletion In the 1980’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

Pollution Water Pollution Oil Spills Gasoline spills Gets into drinking water

BP oil spill, 2010

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

Should we worry?

Herbicides and Pesticides DDT Made in 1874 and used for insecticide in 1939. Controlled malaria and typhus during WWII

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.