Download Air Quality (Environmental Issues) by Yael Calhoun PDF

By Yael Calhoun

Ever because the commercial Revolution, air caliber has been slowly constructing into some of the most urgent matters dealing with either the USA and the realm. As toxins fromn undefined, cars, and chemical compounds has elevated, evnironmental advocates became extra vocal of their calls for for laws.

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Sample text

In the mid-1800s, cities in Europe and the United States experienced periods of intense air pollution from the coal-fired industries of the Industrial Revolution. The term smog was first used to refer to a mixture of fog and smoke. S. Environmental Protection Agency (EPA) revised the Clean Air Act of 1963, creating an ambitious set of regulations to address the problem of dirty air. The EPA works with the states to develop plans and to enforce the regulations to decrease the emissions that cause pollution.

GROUND-LEVEL OZONE: WHAT IS IT? WHERE DOES IT COME FROM? Ozone (O3) is a gas composed of three oxygen atoms. It is not usually emitted directly into the air, but at ground level is What Pollutes the Air We Breathe? created by a chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of heat and sunlight. Ozone has the same chemical structure whether it occurs miles above the earth or at ground level and can be “good” or “bad,” depending on its location in the atmosphere.

S. ” 1 It was not until May 2004 that the American Heart Association (AHA) issued an expert statement about the effects of exposure to air pollutants. Based on scientific reports from the previous decade, the AHA stated that air pollution is a serious public health problem. The following article identifies the connection between air pollution and heart disease. Air pollution contains different components. The EPA has identified and set air quality standards for six common air contaminants: ground-level ozone, nitrogen oxides, particulate matter, sulfur dioxide, carbon monoxide, and lead.

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