It's not a good environmental policy on balance. It results in only about a 30% reduction in CO2 emissions. It does substantially reduce air pollution compare

It's not a good environmental policy on balance. It results in only about a 30% reduction in CO2 emissions. It does substantially reduce air pollution compared to gasoline. But we have to devote large amounts of land usage to it, destroying natural habitats, and we pollute water with runoff. On balance, I would rather emit the CO2, until we can convert transportation fleets to electricity.