why river pollution is a big
issue in today 's era ?
Answers
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Explanation:
Water and air pollution have altered the course of the earth’s history. Along with amazing technological advances, the Industrial Revolution of the mid-19th century introduced new sources of air and water pollution. By the middle of the 20th century, the effects of these changes were beginning to be felt in countries around the world. In the 1960s, an environmental movement began to emerge that sought to stem the tide of pollutants flowing into the planet’s ecosystems. Out of this movement came events like Earth Day and legislative victories like the Clean Air Act (1970) and the Clean Water Act (1972). Global warming caused by air pollution continues to be a threat that the scientists of the world are racing to address.
course of several days. A few years earlier, in 1948, severe industrial air pollution created a deadly smog that asphyxiated 20 people in Donora, Pennsylvania, and made 7,000 more sick. Acid rain, first discovered in the 1850s, was another problem resulting from coal-powered plants. The release of human-produced sulfur and nitrogen compounds into the atmosphere negatively impacted plants, fish, soil, forests and some building materials.
The Keeling Curve developed by geochemist Charles Keeling in the late 1950s revealed a steady rise in CO2 levels that can lead to climate change, and by the 1980s, computer models were showing that a doubling of CO2 could cause global temperatures to rise between 2.6 degrees F within the next century.
The ALA defines particle pollution (formerly referred to as soot) as “the most dangerous, and deadly, of the widespread outdoor air pollutants.” Particle pollution is microscopic and derived from “a complex mixture that can include ash, soot, diesel exhaust, chemicals, metals, and aerosols.
In the eastern U.S., many particles come from power plants that burn coal to produce electricity. In the western U.S., many come from diesel buses, trucks, and heavy equipment, as well as agriculture and wood burning,” according to the ALA. “Breathing particle pollution year-round can shorten life by one to three years. It causes many other health effects, premature births to serious respiratory disorders, even when the particle levels are very low. It makes asthma worse and causes wheezing, coughing and respiratory irritation in anyone with sensitive airways. It also triggers heart attacks, strokes, irregular heartbeat, and premature death.”
In 2007, CNN reported that “up to 500 million tons of heavy metals, solvents and toxic sludge slip into the global water supply every year. In the developing world [according to UNESCO] as much as 70 percent of industrial waste is just dumped untreated into the rivers and lakes. China is a perfect case in point. According to Greenpeace, around 70 percent of China’s lakes and rivers are now polluted from industrial waste, leaving 300 million people ‘forced to rely on polluted water supplies.'” Water sources are also contaminated by rain runoff from such things as oil-slick roads; construction, mining and dump sites; and livestock wastes from farm operations. Leaky septic tanks, pesticides and fertilizers are among the other sources that can contaminate groundwater.
The Clean Water Act
In 1972, Congress passed the Clean Water Act to reduce water pollution. Various pieces of anti-pollution legislation have followed since that time and today the U.S. has relatively clean, safe drinking water compared with much of the world. However, water pollution is still a problem. In 2006, the Environmental News Service (ENS) reported that “more than 62 percent of industrial and municipal facilities across the country discharged more pollution into U.S. waterways than their Clean Water Act permits allowed between July 2003 and December 2004.” The ENS also noted that over 40 percent of American waterways were unsafe for swimming and fishing. Additionally, water resources face an ongoing threat from man-made environmental disasters such as the 1989 Exxon Valdez oil spill, during which approximately 11 million gallons of crude oil were accidentally dumped into the sea off Alaska’s Prince William Sound. The disaster, which created a 3,000-square-mile oil slick, instantly killed hundreds of thousands of birds, fish and other wildlife and devastated the area for years afterward.
How Can We Stop Air and Water Pollution?
According to EPA.gov, air pollution can be lessened by carpooling or using mass transit or hybrid vehicles that reduce your carbon footprint. To avoid water pollution, do not dispose of oils, grease, fat, or chemicals down the sink. Flushing pills or medications can also negatively impact groundwater. Since 1970, environmental activists and allies have been celebrating Earth Day in an effort to raise awareness of the dangers of water and air pollution to our environment and health.
River pollution is a big issues as river are lifeline of any nation and they need to be conserved.
Explanation:
- Today river is considered a source of life, some are considered sacred to religions while many over have run dry and are polluted due to the untreated chemical wastes and hazardous substance that harms the BOD values of the rivers making them unfit to use and destroying their natural beauty.
- The river is also considered to be aesthetic beauty and many are used for recreational purposes but due to the problems, pollution and pollution contamination in water bodies are creating big issues in the water drainage system.
- Regions were the groundwater levels have completely been depleted, river are an essential source of water on the surface many nations of the world are forced to import clean water due to increased acidity and salinity of rivers.
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- brainly.in/question/18580923 answered by Beverlyferrao2008.