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Water pollution isn't just a problem for the United States.According to United Nations, 783 million people do not have access to clean water and around 2.5 billion do not have access to adequate sanitation.
Industries generate hazardous waste from mining, petroleum refining, pesticide manufacturing and other chemical production.
Households generate hazardous waste as well, including paints and solvents, motor oil, fluorescent lights, aerosol cans and ammunition.
Another common type of air pollution is dangerous gases, such as sulfur dioxide, carbon monoxide, nitrogen oxides and chemical vapors.
These can take part in further chemical reactions once they are in the atmosphere, creating acid rain and smog.
It can happen when a factory or power plant that is using water to cool its operations ends up discharging hot water.
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This makes the water hold less oxygen, which can kill fish and wildlife.Land can become polluted by household garbage and by industrial waste. A little over half of the waste — 136 million tons— was gathered in landfills. Organic material was the largest component of the garbage generated, the EPA said.In 2014, Americans produced about 258 million tons of solid waste, according to the U. Paper and paperboard accounted for more than 26%; food was 15% and yard trimmings were 13%.Commercial or industrial waste is a significant portion of solid waste.According to the University of Utah, industries use 4 million pounds of materials in order to provide the average American family with needed products for one year.Water pollution happens when chemicals or dangerous foreign substances are introduced to water, including chemicals, sewage, pesticides and fertilizers from agricultural runoff, or metals like lead or mercury.According to the Environmental Protection Agency (EPA), 44% of assessed stream miles, 64% of lakes and 30% of bay and estuarine areas are not clean enough for fishing and swimming.Adequate sanitation helps to keep sewage and other contaminants from entering the water supply.According to National Oceanic and Atmospheric Administration (NOAA), 80% of pollution in marine environment comes from the land through sources like runoff."In nearly all cases, 90% of this water is returned to its source, where it can raise the water temperature in an area immediately surrounding the water discharge pipe.Depending on water flow, the water temperature quickly returns to ambient temperatures that do not harm fish." Donn Dears, former president of TSAugust, a not for profit corporation organization focused on energy issues, told Live Science.