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The Associated Press The influential National Academy of Sciences specifically called for a carbon tax on fossil fuels or a cap-and-trade system for curbing greenhouse gas emissions, calling global warming an urgent threat.
The academy, which advises the government on scientific matters, said the United States needs to cut the pollution that causes global warming by about 57 per cent to 83 per cent by 2050. That's close to U.S. President Barack Obama's goal.
“We really need to get started right away. It's not opinion, it's what the science tells you,” said Robert Fri, who chaired one of the three panels producing separate climate reports.
Mr. Fri was acting Environmental Protection Agency chief under president Richard Nixon and until recently on the board of American Electric Power Co., a major producer of carbon dioxide. “The country needs both a prompt and a sustained commitment to reducing greenhouse-gas emissions,” he said Wednesday.
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