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5 天前 · water pollution, the release of substances into subsurface groundwater or into lakes, streams, rivers, estuaries, and oceans to the point that the substances interfere with beneficial use of the water or with the natural functioning of ecosystems. In addition to the release of substances, such as chemicals, trash, or microorganisms, water ...
2024年4月26日 · environmentalism. pneumonia. Great Smog of London, lethal smog that covered the city of London for five days, from December 5 to December 9, in 1952. It was caused by a combination of industrial pollution and high- pressure weather conditions. The smoke and fog brought London to a near standstill and resulted in thousands of deaths.
1 天前 · Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth’s surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases. In 2014 the IPCC first reported that concentrations of carbon dioxide, methane, and ...
2024年4月18日 · greenhouse effect, a warming of Earth ’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, water vapour has the largest effect. The origins of the term greenhouse effect are unclear.
2 天前 · The Black Death is widely believed to have been the result of plague, caused by infection with the bacterium Yersinia pestis. Modern genetic analyses indicate that the strain of Y. pestis introduced during the Black Death is ancestral to all extant circulating Y. pestis strains known to cause disease in humans.
2 天前 · English language is a West Germanic language that originated in England and spread to many parts of the world. It is the dominant language of several countries and the most widely used lingua franca. Learn about its history, development, characteristics, and varieties from Britannica, the online encyclopedia that covers a wide range of topics and personalities.
2024年5月16日 · A natural disaster may be caused by weather and climate events or by earthquakes, landslides, and other occurrences that originate at Earth ’s surface or within the planet itself. No spot on Earth is immune from a natural disaster; however, certain types of disasters are often limited to or occur more frequently in specific geographic regions.
