World of Change

Cities around the globe have already set carbon pollution reduction goals. They’re cutting carbon pollution and creating better places to live in the process.
Rooftop Garden in Chicago (Left Photo © Diane Cook and Len Jenshel/National Geographic Image Collection, Right Photo © Roofscapes, Inc.)

Rooftop Gardens

Chicago's cooling off with rooftop gardens on city buildings. Native plants on City Hall's roof keep it below 90°F even in summer, saving $10,000 in power each year. "Green roofs" cover more than four million square feet of Chicago.

< BACK
NEXT >
A Surface Subway