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					As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997. 2016年6月四级真题(第一套)阅读 Section B
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					Backing this up, recent data show that passenger cars in the UK emitted 69 million tons of CO2 in 2015. 2019年12月四级真题(第一套)阅读 Section C
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					Cracker Jacks has been "gamifying" its snack food by putting a small prize inside for more than 100 years, he adds, and the turn-of-the-century steel magnate (巨头 Charles Schwab is said to have often come into his factory and written the number of tons of  2016年12月四级真题(第三套)阅读 Section B
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					It produces about two million tons of salt that is shipped to more than 1,500 places in the northeastern United States. 2016年12月四级真题(第一套)听力 Section A
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					Just make sure you're getting real food without tons of added salt or sugar. 2015年12月四级真题(第三套)阅读 Section B
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					There are tons of on-campus job opportunities, and as a student, you'll automatically be given hiring priority. 2016年12月四级真题(第一套)听力 Section C
		
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					Amazon plants, for instance, hold more than 100 billion metric tons of carbon, equal to 15 years of tailpipe and chimney emissions. 出自-2013年6月阅读原文
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					billion metric tons of carbon into the atmosphere each year - making forests the leading source of greenhouse gases 出自-2013年6月阅读原文
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					Each burning season in the Amazon, fires deliberately set by frontier settlers and developers hurl up almost half a billion metric tons of carbon a year, placing Brazil among the top five contributors to greenhouse gases in the world. 出自-2013年6月阅读原文
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					My family has tons of camping gear. 出自-2012年12月听力原文
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					Annually, the world generates 1.3 billion tons of solid waste. 2019年6月六级真题(第二套)阅读 Section B
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					It is estimated that in 2014 the world produced some 42 million metric tons of e-waste discarded electrical and electronic equipment and its parts with North America and Europe accounting for 8 and 12 million metric tons respectively. 2019年6月六级真题(第二套)阅读 Section B