The success of the world's first city-level carbon-trading system hasn't had much to do with emissions trading.
New York. Paris. Bacon.
How the world's wealthiest cities can beat back climate change.
Freakonomics revives a tried, and tired, debate.
A new modeling system called "Hestia" traces greenhouse gases to individual urban buildings and roads.
This proposed Chicago building doesn't look like much, but it could clean up the air around the city's expressway.
A new report from the World Bank argues that a better financing system is needed to reduce emissions in China.
Small improvements in roof and road reflectivity are estimated to help create big reductions in carbon emissions.
Experts say America's bullet trains will need to carry 10 million passengers to offset the environmental impact of construction