During the 2009 Pittsburgh Summit, G20 leaders recognized the harmful effects of inefficient fossil fuel subsidies on markets and the environment, and committed to “rationalize and phase out over the medium term inefficient fossil fuels subsidies that encourage wasteful consumption.” To...

Aggressive efficiency improvements and a shift away from fossil fuels cannot offset climate change threats. This realization creates an imperative for ‘carbon-negative’ mitigation measures; that is, measures that can reduce atmospheric carbon faster than emissions will load the atmosphere....