WATER POLLUTION Water is vital to our survival. It covers about 70% of the surface of the earth, but only 2.5% of that is fresh and 1% of that is available for use. The truth is, we are hurting our environment by polluting our water sources and as a result, killing fish, turtles, and other marine critters. The EPA states that “46% of US streams, 21% of lakes, 18% of coastal waters, and 32% of the nation’s wetlands are contaminated by pollution.” 1 Causes Things that can cause pollution include sewage, toxic waste, oil spills, heavy metal bioaccumulation, plastic, and even invasive species, algal blooms, and ocean acidification. One of the main pollutants is untreated sewage. Untreated sewage is waste like feces, urine, and pharmaceutical products in water. It is estimated that 80% of the world's sewage is untreated. This kills 2.2 million people annually worldwide from diarrheal diseases. 2 Toxic industrial chemicals hurt the environment as well. These include heavy metals like l...