Your question is a matter of opinion, really. The EPA’s Endangerment findings indicated that greenhouse gases are indeed quite a danger, and have been greatly increased by human activities. Currently, the EPA’s proposed regulations (which they backed down on) recommended that light-duty vehicle emissions be curbed, leading to a decrease in 950 metric tons of greenhouse gases in the atmosphere. But in 2007, total emissions of greenhouse gases in the United States amounted to 7,181.4 million metric tons. To me, this signifies that the greenhouse gas regulations need to be tightened, much more than the EPA is proposing. 950 million metric tons is certainly some change, but it’s just not enough.
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