River pollution comes from a variety of different sources, including agricultural operations, industrial discharge, wastewater treatment plants and storm water runoff, that carry pollutants into waterways. Sources are classified as point sources if the pollution comes from a single, identifiable source and nonpoint sources if the pollution is the result of runoff over a wide area. Since rivers draw from many sources, they may contain many different pollutants.Know More
Point-source pollution is the easiest type of river pollution to correct, as it can be traced to a single source. An industrial operation may accidentally discharge untreated pollutants into a river, or a flood at a wastewater treatment plant may cause sewage to flow into a waterway. These spills can be massive and release large amounts of pollutants over a short period of time, but once the problem is corrected, the river can eventually recover.
Nonpoint-source pollution is much more difficult to deal with. As rain or floodwater flows over land, it picks up any contaminants present. Oil and grease from roadways, excess nitrogen and pesticides from farmland, heavy metals from mining and scrapping operations and loose sediment may find their way into the river, carried through the water cycle by runoff.Learn more about Pollution
Causes of solid waste pollution are pollutants from households, industrial units, manufacturing units, commercial establishments, landfills, hospitals and medical clinics. The pollutants from these places may be in the form of non-biodegradable matter or non-compostable degradable matter.Full Answer >
Some causes of radioactive pollution include nuclear power plants, energy factories, mining, improper waste disposal, nuclear testing, terrorism and other human activities. Radioactive pollution can enter the environment by water, air and soil contamination. Regardless of its origin, radioactive pollution is particularly hazardous to animals and the environment.Full Answer >
Space pollution, often called space debris, refers to satellites and other material that occupies a relatively small portion of low-Earth orbit. Scientists are concerned that a cascade of breaking debris could pose a threat to future launches.Full Answer >
Ocean pollution is caused by numerous industrial and domestic activities, which include oil spills, garbage dumping, sewage and factory-waste disposal and the use of toxic pesticides. These activities pollute the oceans through drains, rivers and direct dumping. According to All Recycling Facts, land-based activities account for more than 80 percent of ocean pollution.Full Answer >