How to reduce your carbon footprint from flying

London mulls car-free days to curb air pollution

The roads least taken in America

Coming this summer to Central Park: No cars

Costa Rica poised to become world's first fossil fuel-free country

Why we need more pedestrian scrambles

New York's Tappan Zee Bridge to live on as artificial reef

10 strange roads you can actually drive on

We should worry about boomers on e-bikes

This Swedish highway charges electric vehicles as they drive along

Push toward transit-oriented housing proves divisive in California

With JUMP, Uber expands into bike-sharing biz