The Toyota Mirai is powered by hydrogen fuel, which can be made from poop.
The feds attempt to bring some order to the mess of rules around self-driving cars.
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Watch and learn how natural structures can defend our coasts.
Private car ownership is going the way of the dodo, says a manifesto published by Lyft co-founder John Zimmer. Instead, you'll subscribe to your ride.
A new report helps us visualize just how smoggy American cities would be without air pollution regulation.
L.A. City Council pushes the city to go all renewable.
Much of NYC will be under water in 100 years -- but that doesn’t necessarily mean we should make a hasty retreat from the coastlines.
The smile will activate at crosswalks to alert pedestrians that it's safe to cross.