Land, Water, and Air Resources Chapter 4 4.3 Water Pollution and Solutions 4.4 Air Pollution and Solutions

Water – A limited Supply Most of the Earth’s surface is covered with water.

Water – A limited Supply Most of the Earth’s surface is covered with water. It is limited because 97% is salt water.

Water – A limited Supply Most of the Earth’s surface is covered with water. It is limited because 97% is salt water. The remaining 3% is fresh water, but - 75% is ice.

Ground Water <-vocab word Fresh water that soaks into the earth and is stored in soil and rock beneath the Earth’s surface.

Ground Water <-vocab word Fresh water that soaks into the earth and is stored in soil and rock beneath the Earth’s surface. Most people rely on groundwater for their fresh water.

Renewing the Water Supply The water cycle constantly returns clean fresh water to the Earth.

Renewing the Water Supply The water cycle constantly returns clean fresh water to the Earth. Evaporation does not carry pollution.

Water Shortages Shortages happen when people use water faster than the water cycle can replace it.

Water Pollution Pollution can be devastating because fresh liquid water supplies are scarce.

Keeping Water Clean The key to keeping water clean: 1 - . 2 - 3 –

Keeping Water Clean The key to keeping water clean: 1 - proper sewage treatment . 2 - t 3 –

Keeping Water Clean The key to keeping water clean: 1 - proper sewage treatment . 2 - the reduction of pollutants 3 –

Keeping Water Clean The key to keeping water clean: 1 - proper sewage treatment . 2 - the reduction of pollutants 3 – effective cleanup of oil & gasoline spills NEXT 4.4 Air Pollution and Soultions

Air You cannot see it, smell it, or taste it but you are surrounded by air.

Smog Truck & Auto emissions-exhaust are the main source of smog

Smog Truck & Auto emissions-exhaust are the main source of smog. The gases released by burning fossil fuels (gasoline) react with sunlight to create ozone

Smog Truck & Auto emissions-exhaust are the main source of smog. The gases released by burning fossil fuels (gasoline) react with sunlight to create ozone. Ozone is a toxic form of oxygen – O3

Acid rain When precipitation falls through EMISSIONS = polluted air it makes acid rain.

Acid rain When precipitation falls through EMISSIONS = polluted air it makes acid rain. EMISSIONS are pollutions released into the air.

Acid rain When precipitation falls through EMISSIONS = polluted air it makes acid rain. EMISSIONS are pollutions released into the air. Water becomes more acidic when it dissolves the gasses.

Indoor Air Pollution Four Indoor sources: 1 . Dust or pet hair that impact people with allergies.

Indoor Air Pollution Four Indoor sources: 2 . More dangerous such as toxic chemicals or household cleaners

Indoor Air Pollution Four Indoor sources: 3 . Carbon Monoxide gas Has no color or smell. It comes from burning fuel. It is deadly in enclosed spaces.

Indoor Air Pollution Four Indoor sources: 4 . Radon gas. Difficult to detect. Also colorless, no smell. It is radioactive.

Reducing Air Pollution The key to reduction is to control emissions. 1- 2- 3-

Reducing Air Pollution The key to reduction is to control emissions. 1- Air scrubbers in factories.

Reducing Air Pollution The key to reduction is to control emissions. 1- Air scrubbers in factories. 2- Control emissions from vehicles with Pollution control devices

Reducing Air Pollution The key to reduction is to control emissions. 1- Air scrubbers in factories. 2- Control emissions from vehicles with Pollution control devices 3- Laws and standards

What you can do Even small changes make a difference To reduce Power Plant emissions use less electricity. Drive less, use public transportation The end