GEOLOGY

Detailed explanation-1: -Freshwater pollution originates from many sources, including municipal, industrial and agricultural waste, wastewater and nutrient run-off, power generation, heavy industry, automobiles, and others. Around the world, some 2 billion tonnes of human waste are disposed of in water courses every day.

Detailed explanation-2: -Nutrient pollution, which includes nitrates and phosphates, is the leading type of contamination in these freshwater sources. While plants and animals need these nutrients to grow, they have become a major pollutant due to farm waste and fertilizer runoff.

Detailed explanation-3: -Chemical pollution The most common type of water pollution, chemicals can infiltrate both underground water sources and those sitting on the Earth’s surface.

Detailed explanation-4: -Water pollutants include chemicals, bacteria, parasites, and trash.

Detailed explanation-5: -Chemicals Runoff from industrial and agricultural areas is one of the most common ways that these chemicals get into groundwater. However, current estimates state that there are about 20, 000 known abandoned and uncontrolled hazardous waste sites in the United States, and that number increases with each passing year.