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.Continue Reading
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
Some of the major causes of air pollution include burning of fossil fuels, agricultural activities, exhaust from industries, vehicle fumes, mining operations and indoor pollutants. Air pollution has a negative impact on the environment and life in general.Full Answer >
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 >
Air pollution occurs when the air contains pollutants such as gases, fumes and dust in harmful amounts. Air pollution can be harmful to the health of humans and animals if left unchecked.Full Answer >
The main causes of air pollution include the emission of greenhouse gases, such as carbon dioxide, methane, and chlorofluorocarbons, emission from volcanic eruptions and toxic air pollutants emitted by vehicles. The amount of smog as well as the damaging effects on health and the environment indicate the severity of air pollution.Full Answer >