With all the recent news around the Paris climate agreement and the US Clean Power Plan, one key component of the renewable energy puzzle that hasn’t been addressed is the transportation sector. Transportation accounts for approximately 30% of the total energy consumed in the United States and, correspondingly, about 30% of the greenhouse gas emissions (see figure for 2013 greenhouse gas emission data from EPA). Yet very little has been said about how the country and world will transition from a fossil fuel based transportation system to renewables. Continue reading What about transportation? →