As more people and goods move around the planet, our cars, planes, trains, and ships are having a growing impact on the climate. Transportation now generates almost a quarter of the world’s greenhouse gas emissions, and in 2016, transportation (including ships, aircraft and railroads) in the U.S. produced more carbon dioxide emissions than any other sector. Shifting from vehicles that burn fossil fuels to those that run on electricity will play a key role in curtailing climate change—in order for countries to meet the carbon-cutting targets they set for the Paris Climate Agreement, 100 million electric vehicles (EVs) must be on the road by 2030. However, in 2015, there were only 1.26 million.