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Only trouble was, Earth is a much smaller place than we thinkĪnd pollution doesn't always disappear so conveniently. They built really high smokestacks, the wind would simply blow their smokeĪway, diluting and dispersing it so it wouldn't be a problem. In less enlightened times, factory operators thought that if Windy countries-air pollution will often disperse relatively Since Earth's atmosphere is very turbulent-many of us live in It in usually does no harm (you breathe it out all day long) but air with an extremely highĬoncentration of carbon dioxide (say, 5–10 percent) is toxic and could kill Or cause some other kind of nuisance (reduced visibility, perhaps, or an unpleasant odor).Īs with water pollution and land contamination, it's the quantity (orĬoncentration) of a chemical in the air that makes theĭifference between "harmless" and "pollution." Carbonĭioxide (CO 2), for example, is present in the air around youĪt a typical concentration of less than 0.05 percent and breathing Or disrupt some other aspect of the environment (such as making buildings crumble), Other animals, kill plants or stop them growing properly, damage Released in a big enough quantity to harm the health of people or Something like this: Air pollution is a gas (or a liquid or solid dispersed through ordinary air) We can breathe ordinary air all day long with no ill effects, so let's use that simple fact to define air pollution, Up of two gases (78 percent nitrogen and 21 percent oxygen), with aįew other gases (such as carbon dioxide and argon) present in Broadly speaking, air is almost entirely made What can you do to help reduce air pollution?Īir lets our living planet breathe-it's the mixture of gases that fills the atmosphere, giving life to the plants and animals that make Earth.
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How can we solve the problem of air pollution?.How air pollution works on different scales.Modern pollution made by traffic consists of gases like nitrogen dioxide and "particulates" (microscopic soot and dust fragments) that are largely invisible. Thanks to tougher pollution controls, modern power plants produce only a fraction as much pollution. This is an old photo of the kind of smoke that used to come from coal-fired power plants and, apart from soot (unburned carbon particles), its pollutants include sulfur dioxide and the greenhouse gas carbon dioxide. Photo: Air pollution is obvious when it pours from a smokestack (chimney), but it's So what exactly causes this majorĮnvironmental issue and what can we do about it? Let's take a While a further 3.8 million die due to dirty indoor air.Īir pollution is a huge problem-and not just for people living in smog-choked cities: through such things as global warming and damage to the ozone layer, it has the potential to affect us all. The gases you're sucking up through your noseĬould be slowly killing you: according to theĪround 4.2 million people die prematurely from the effects of polluted, outdoor air every single year, You're a scientist with a chemistry lab at your fingertips, there's There's nothing quite like opening the door and breathing fresh, clean,Īir-but how clean is the air you're breathing right now? Unless