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For a multitude of reasons – climate change, air quality, national security, etc. – a large reduction in the burning of carbon-based fuels is a good idea. Since higher prices are known to reduce consumption, one way to achieve this is to simply put a tax on fuel at the pump. It's been proposed by GM's Dan Akerson, Bill Ford and others, but the idea can be difficult politically and economically. With current prices already relatively high, further increases negatively impact the cost

On Wednesday at the Climate Change Research Conference in Sacramento, California, James Hansen the director of NASA's Goddard Institute for Space Studies made a firm statement regarding global climate change. He said the world has a 10-year window of opportunity to keep carbon dioxide emissions growth in check to limit the increase in global temperatures to 1 degree Celsius (1.8 degrees Fahrenheit). He warned that taking no action would result in drastic consequences including a significant rise