北師大版高中英語(yǔ)模塊8--Unit 22 lesson1-2

北師大版高中英語(yǔ)模塊7--Unit 22 lesson1-2 [00:00.80]When the atmospheric concertrations [00:03.16]of these gases increase, however, [00:05.84]more heat is trapped and the Earth's [00:07.92]temperature rises. [00:10.37]Over the last 100 years, [00:13.01]the global average temperature [00:15.10]has increased by 1°F and many experts [00:19.48]insist that this global warming [00:21.70]is mostly due to human activities. [00:24.98]As a result of increased industry, [00:27.89]agriculture, transportation, deforestation [00:31.12]and the burning of fuels, [00:33.20]nearly 6 tonnes of carbon dioxide [00:36.16]is released into the atmosphere annually [00:39.23]for every one of the Earth's [00:40.95]6 billion people today. [00:43.58]The atmospheric concentration of carbon dioxide [00:46.85]has risen by more than 30% [00:49.63]in the last 250 years with half [00:52.68]of this increase occurring since 1960. [00:56.53]Given this date,it seems that the link [00:59.23]between human activities nad rising global [01:02.58]temperatures cannot be denied. [01:05.75]A temperature increase of 1°F [01:09.12]sounds insignificant, [01:11.36]but if we continue toproduce greenhouse gases [01:14.77]in such huge quantities, [01:17.13]we should expect severe consepuences. [01:20.36]Recent repots from the Intergovernmental Panel [01:23.09]on Climate Change(IPCC) warned [01:27.44]that golbal warming will cause dramatic climate [01:31.06]changes including more frequent floods, [01:34.13]heat waves,and droughts. [01:35.53]

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