单词：density of gases
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THE PROPERTIES OF WATER Earth is an ocean planet. About three billion years ago, life on our planet began in the deep blue seas. Ninety-nine percent of the living space on earth is in the oceans. Marine life is incredibly rich and varied. There are
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On a restricted site in northern Wisconsin, the hissing you hear is helping scientists see the future. Inside towering rings of pipes, aspen, birch, and sugar maples feed on measured diets of greenhouse gases. Our studies were looking at what forest
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Rich cities around the world are largely responsible for greenhouse gas emissions, says a new study. The study measures emissions based on the use of goods and services, such as food, clothing and electronics, by people living inside cities. It inclu
2018年VOA慢速英语(三)月
Scientists Develop New Ways to Track Greenhouse Gases With more than 18 million people living, working and driving in Los Angeles, the city often is covered in a hazy layer of smog. Stan Sander, senior research scientist at the U.S. space agency's Je
VOA标准英语2013年(七月)
By Mil Arcega Washington, DC 06 April 2006 watch Global Warming report The state of California could become the first to impose emission caps on businesses to limit greenhouse gases. California Govern
2006年VOA标准英语（四月）
By Phil Mercer Sydney 02 April 2008 Australia's first large underground carbon storage facility has opened in the southern state of Victoria. The geo-sequestration plant will capture carbon dioxide from a power station and store it two kilometers ben
VOA常速英语2008年（四月）