By Dana Desonie
Для детей от 12-ти лет
Learn how inhabitants progress has elevated source intake and brought on a few environmental difficulties, in addition to how you can defend the surroundings for destiny generations. comprises full-color pictures and illustrations, sidebars, word list, study resources, writer profile and index.
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Additional info for Humans and the Natural Environment: The Future of Our Planet
The byproduct of consumption is pollution and waste, and each citizen of the United States, Western Europe, and Japan not only con sumes 32 times more resources than does each citizen in the Third World, each of them also produces 32 times more waste. The ecologi cal footprint of a resident of the United States is 13 times that of a resident of India and 52 times that of a resident of Somalia. China’s incredible economic growth has come at a steep price. According to the Worldwatch Institute, 16 of the world’s 20 most pol luted cities in 2006 were in China.
Wetlands are like a bank for holding water: During floods, they absorb water and reduce flood damage. Dur- ing droughts (times of below-normal rainfall) they provide water to streams. Water in wetlands seeps into the soil to recharge groundwater supplies. Many plants and animals depend on wetlands for their food and their living environment, known as habitat. Wetlands also serve as nurseries for young animals, including commercially valuable fish and shellfish species. As water trickles through wetlands, the rich soil filters pollutants.
Humans are also ingenious: If a resource is depleted, they can find other ways to obtain it, or they can substitute a different resource. For example, if water is in short supply, but energy is abundant and cheap, humans can create drinking water by building plants to desali nate seawater. Humans undoubtedly exceed the carrying capacity of some regions—sub-Saharan Africa, a region of chronic hunger and overpopulation, is one example. Overpopulation Debate Debate about overpopulation likely began with an essay written by the Reverend Thomas Malthus (1766–1834) and published in 1798 (when 17 18 humans and the natural environment world population was 978 million).