On today's Times op-ed page, economist Paul Krugman suggests not only that all is not lost, but that addressing carbon emissions may not even cost very much. We can talk in class about the limitations of his analysis; nonetheless it is a nice counterweight to the sense of impending doom we have encountered lately:
http://www.nytimes.com/2014/04/18/opinion/krugman-salvation-gets-cheap.html?ref=opinion&_r=0
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