Environmental Science for Students provides a fascinating look at some of the most important environmental issues of our time. Do you know the quality of the air that you breath? Ait polution from both natural sources and human activity can affect humans, plants and animals in many ways. Learn about primary and secondary sources of air pollution, explore how outdoor air quality is monitored by government agencies and see how climate, geography, industry and other factors can contribute to the formation of photochemical smog. See how the enormous challenge of regulating and reducing air pollution can be tackled at local, national and international levels. From green roofs to the Clean Air Act to the Kyoto Protocol, improving air quality in one part of the world can have a positive effect the world over.