From large pieces of garbage to invisible chemicals, various pollutants eventually enter our planet's lakes, rivers, streams, groundwater, and eventually into the ocean. Water pollution, coupled with drought, low efficiency, and human explosions, has led to a freshwater crisis that threatens our drinking water sources and other critical needs for survival.
Water pollution may come from multiple sources. Pollution can enter water directly through legal and illegal discharge by factories, such as incomplete water treatment plants. The overflow and leakage of oil pipelines or hydraulic fracturing (hydraulic fracturing) operations can reduce the quality of water supply. Winds, storms, and littering (especially plastic waste) can also send debris into waterways.
To a large extent, thanks to decades of regulatory and legal action against large polluters, the main cause of water quality problems in the United States is now "non point source pollution", where pollutants are carried or passed through the ground through rainwater or snowmelt. This runoff may contain fertilizers, insecticides, and herbicides from farms and households; Petroleum and toxic chemicals in roads and industries; Sediment; Bacteria from livestock; Pet feces; And other pollutants.
Finally, if the water is not properly treated, drinking water pollution may occur through the pipeline itself, just like lead pollution in Flint, Michigan and other towns. Another type of drinking water pollutant, arsenic, may come from natural sediments or industrial waste.
Water pollution can lead to human health problems, wildlife poisoning, and long-term ecosystem damage. When agricultural and industrial runoff inundates waterways with excessive nutrients such as nitrogen and phosphorus, these nutrients typically promote the proliferation of algae, resulting in dead zones or low oxygen areas where fish and other aquatic organisms no longer thrive.
The proliferation of algae can have health and economic impacts on humans, causing rashes and other diseases, while also eroding the tourism revenue of popular lake destinations due to their unpleasant appearance and odor. Nutritional pollution leads to high levels of nitrate in water, which is particularly harmful to infants, interfering with their ability to deliver oxygen to tissues, and may lead to 'blue baby syndrome'. The Food and Agriculture Organization of the United Nations est
imates that 38% of the EU's water bodies are under pressure from agricultural pollution.
标签：may,water,other,through,drinking,pollution From： https://www.cnblogs.com/kkkkfyh/p/17801908.html