If you want to reduce greenhouse gas emissions, consider commuting by robo-cab.
Researchers at the Lawrence Berkeley National Laboratory report that by 2030, traveling by driverless taxi could lower greenhouse gas emissions by as much as 90% compared with the same length ride in a privately-owned gas-powered car today.
Even if you had a more efficient hybrid car of your own in 2030, the researchers calculated that a ride in an autonomous taxi would still reduce per-mile greenhouse emissions by as much as 82%.
The research was published this week in the journal Nature Climate Change.