1) What percentage represents how much salt water there is on earth? a) 97% b) 50% c) 77% d) 2% e) 3% f) 80% 2) What impact does water pollution have on humans? a) Serious diseases b) Be less intelligent 3) How many people die a year from diseases due to dirty water? a) 5million b) 1899persons c) 853 persons d) 3.3millions e) 1353 persons f) 7millions 4) What are some of the sources of water pollution? a) Use your cell phone while you walk b) Human and animal waste c) reed bocks  d) Eat junk food e) use the phone  f) Don't recycle 5) What is another reason why water is contaminated? a) Kill fish b) Fossil fuels 6) What are "aquifers"? a) Bacteria that cause cholera b) Large masses of ice c) Chemical products d) Layers of underground rock 7) What places does the text mention that are being contaminated? a) Mexico  b) America c) rivers d) Africa e) The United States f) Lakes 8) What natural disasters are named as causes of water pollution? a) Throwing chemical waste into the seas, rivers or lakes b) Fossil fuels c) Deforestation d) kill fish e) Industrial waste f) Tsunamis

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