• The main causes are briefly described as under: 1
  • Environment
  • Causes and Effects of Air Pollution

An easy-to-understand introduction to air pollution, covering the causes and effects, the different types, and the solutions.

Air Pollution: Everything You Need to Know - NRDC

A lesson on the Causes of Pollution - Lesson Plans Page

Air pollution affects the health of humans, the atmosphere and the ecology
An oil spill in the ocean or a sewage spill in ariver meet this definition of pollution, but other types of pollutionare different. What if you dragged a net through San Francisco bayand hauled up a load of?What if you went fishing in England and caught an? You might be delighted to have caught something more than an old boot, but boththese things are examples of pollution: they are what we call (or "alien species") that don't belong in the placeswhere we now commonly find them.

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What are the causes of air pollution? Anything people do that involves burning things (combustion), using household or industrial chemicals (substances that cause chemical reactions and may release toxic gases in the process), or producing large amounts of dust has the potential to cause air pollution.
We've defined water pollution as something "toxic,harmful, or a nuisance," but how bad can its effects be? The answeris all about : how much of a polluting substance orchemical is present in a river, lake, or sea. If there's enough oilto wipe out one or more species, an entire ecosystem may be affected,because each species depends critically on all the others. You mightthink it doesn't matter if all the insects (say) disappeared from ariver corridor. But what feeds on those insects? Bats, birds, andother creatures. And what feeds on those? A relatively small changeto one part of an ecosystem can cause knock-on damage felt by manyother species. Effects like that can take years to fully manifestthemselves, which means they're not always obvious and not alwayseasy to trace back to a single episode of pollution.

 

Air pollution is a major environmental risk to health


Just as we need to think hard about the causes ofpollution—looking beyond the immediate reasons for deeper social oreconomic factors that may have caused them—so we need to take carewhen we think about pollution's effects. It's relatively easy toconsider something like an oil tanker spill and measure the effect ona local fishing community over the coming days, weeks, months, andyears. But what about the longer-term effects of pollution happeningin many places at once? Although some water pollution can be neatlytraced to a single place, time, or event (we call it ), much of it builds up from many different sources overa long period of time (we call that or ).What are the effects of, for example, all the chemical factories inthe world that dump toxic liquids into wastewater? How much of thatfinds its way into rivers, seas, and even groundwater that we mightdrink? Are the concentrations of toxics too small to worry about? Andhow do we know? One problem we have is that toxic chemicals may becarcinogenic (cancer-causing), but cancers take years or decades todevelop and people get them for many different reasons, so it can bevery hard to say, with any certainty, that particular factories havea harmful effect on human health because they contribute to waterpollution. [13]


Whichever form of water pollution you consider,you'll find the simple causes lead to deeper questions about how oursociety works. Take the problem of , for example. That'scaused when air pollution from smokestacks blows long distancesbefore meeting up with rain clouds. When the rain falls, it dissolvesthe pollution and produces acid, which changes the pH (acid-alkali balance) oflakes and rivers, making them too acidic to support fish life. Who orwhat is responsible for acid rain? Is it the companies who operatethe smokestacks? Since many of them are power plants, is it theordinary people—you and me—who use their electricity? Is it thegovernments who fail to do anything about the problem?


Environmental Pollution, Its Sources and Effects

Maybe oil tanker spills in the ocean or plastic trash washed up on the beach? Maybeyou've seen shopping carts floating in your local river or hugegrowths of algae turning lakes green? These are all examples of waterpollution, but they're by no means the only examples. That's why, ifwe want to define "water pollution," we have to use quite a wideand general definition. Usually what we mean by pollution is"something that doesn't belong in the natural environment."

Air pollution can wreck your mental health too | Grist

The answer is that water companies go to great lengths to purify drinking water, whether itcomes from a bottle or a tap (faucet). That's very reassuring, butwhat does it tell us about the rest of the water on our planet: thewater we swim or bathe in, the water in our rivers, and the water inour seas? Would you be happy to drink water from your local river?Would it bother you if you accidentally swallowed water from the sea?Do you worry about the water that comes out of your tap and drinkbottled water instead? The fact that we all worry about things like this is a sign that water pollution is one of the world'sbiggest environmental problems. What causes it, what effect does ithave, and what can we do to stop it?

7 Ways To Reduce Air Pollution In Your Home And City

Last week, an official Chinese news report said the cost of environmental degradation in China was about in 2010, or 3.5 percent of the gross domestic product. The estimate, said to be partial, came from a research institute under the Ministry of Environmental Protection, and was three times the amount in 2004, in local currency terms. It was unclear to what extent those numbers took into account the costs of health care and premature deaths because of pollution.