USA Today: Eight Nobel-prize winning economists and scientists have joined more than 2,000 others in signing a letter today that urges the Senate to take swift action on climate change. “The longer we wait, the harder and more costly it will be to limit climate change and to adapt to those impacts that will not be avoided,” reads the letter, which is available on the Union of Concerned Scientists’ website here. “Many emissions reduction strategies can be adopted today that would save consumers …