This reference text is suitable for high school students studying geology and Earth sciences, as well as general readers. It covers the basic balance of nature; environmental degradation; climate change; hydrologic activity; coastal processes; tectonic hazards; erosion and slides; desertification; natural resources; and land use. Nicely chosen but fuzzy baw photographs throughout, as well as line drawings and maps.Much of the seasonal variation in the atmospheric concentration of carbon dioxide is correlated with a rapid rise of ... to 20 times more carbon per acre than cropland or pasture, and they contain as much carbon as does the entire atmosphere. ... Although the forests of North America and Europe have a net accumulation of carbon, the absorption of excess carbon ... Each year, human activities emit into the atmosphere 27 billion tons of carbon dioxide, containing 7.4 billion tons of carbon.
|Publisher||:||Infobase Publishing - 2009-01-01|