Oil’s Plunge Has Created Opening For Carbon Tax. Lawrence Summers, January 6, 2015, Opinion. “The case for carbon taxes has long been compelling. With the recent steep fall in oil prices and associated declines in other energy prices, it has become overwhelming. There is room for debate about the size of the tax and about how the proceeds should be deployed. But there should be no doubt that, given the current zero tax rate on carbon, increased taxation would be desirable…” Link