FRESH WATER

CONTAMINATION

• microorganisms
• bacteria
• parasites
• industrial waste
• pesticides
• run off (nitrates)

WATER POLLUTION

• natural: volcanoes,algae blooms, animal waste, silt from storms and floods (runoff)
• human: sewage, pesticides, fertilizers, waste water, chemicals from factories, silt from construction, trash from littering
• oil spills: Exxon Valdez oil spill “caused by an oil tanker hitting a reef off the coast of Alaska- over 11 million gallons of oil spilled into the ocean.”
• acid rain: sulfur dioxide gets high into the air they combine with rain and produce acid rain because of evaporation

PREVENTION

• save water: take shorter showers, don’t leave toilet water running, don’t leave faucets running
• don’t use weed killer
• scrape your plates clean into the trash and don’t put grease into the kitchen drain
• trash- always pick up your trash, especially when at the beach, lake, or river.

SITES

• https://www.ducksters.com/science/environment/water_pollution.php
• https://www.google.com/search?q=how+can+water+be+comtaminated&ie=UTF-8&oe=U...