From Shanghai to Seattle, the world's cities are built on massive amounts of sand.
WASHINGTON Bill Gates exudes optimism in discussing the world’s ability to tackle climate change – until he hits on manufacturing. About that, he is worried.
(This Sept. 24 story corrects to remove 'U.S' from headline. Hayhoe is Canadian)
SACRAMENTO, Calif./WASHINGTON, D.C. Air quality in five major cities in Oregon was the worst on record as the state continues to be blanketed by thick smoke from wildfires ravaging nearly 5 million acres in the U.S. West, environmental officials in the heavily forested state said.