Continuously Planting Crops Deplete soil of

Nitrogen

Dumping Nitrogen Containing compounds in lakes. Uncontrolled

growth of plants

HUMAN IMPACT

Cutting down forests (Less Co2 being absorbed)

Burning of Fossil Fuels (More Co2 being released)

OZONE-THINNING

Chlorofluorocarbons (CFC’s): Once widely used as coolants

and propellant in aerosol cans Depletes the Ozone layer More UV-rays hitting the earth Discovered in 1980’s

GLOBAL WARMING

More greenhouse gasses in the atmosphere because of burning of fossil fuels Scientists noticed increase

in global temperatures as CO2 levels have increased.

ATMOSPHERIC CARBON DIOXIDE

GLOBAL TEMPERATURES

ACID PRECIPITATION (RAIN)

Air Pollutants + Water forms ACID! Increased acidity of soil or

water can cause disease or death in trees, fish, and other organisms

Neutralizing a Volcanic Acid

lake.

BIOLOGICAL MAGNIFICATION

When toxic chemicals become more concentrated in the tertiary consumers of an ecosystem. Example: DDT &

Mercury

ECOSYSTEM DISRUPTION

Extinction The Death of Every

member of the species. Endangered

A species who is in danger of extinction

CAUSES

Habitat Destruction: Cutting down of forests Damming rivers Draining swamps Surface mining Logging Clearing of land for

buildings/roads Hunting/Poaching

EXAMPLE: SEA OTTER

Web LinksSea Otter Web Cam

Kelp Forest at Monterey Bay Aquarium

OVER –USAGE OF RESOURCES

Sustainability The idea that the human

population can SURVIVE indefinitely!

What has to happen? Renewable resources

(continue to plant) Our needs vs. Earth’s

Needs vs. Needs of Other Species?

GO GREEN!

RENEWABLE NON-RENEWABLE

Water

TreesWind

Oil

Metal/Minerals