A snapshot of how 2012 stacks up against the five other warmest years ever recorded in the U.S.
As the graphic shows, people cause most wildfires. But lightning-ignited fires burn by far the most territory.
Online searches for the word Ã¢Â€ÂœpollenÃ¢Â€Â have gone through the roof this spring, and if you know anyone with seasonal allergies (and who doesn't?) this isnÃ¢Â€Â™t surprising.
For decades, some nuclear engineers have been pushing an alternate technology that they claim could address all the concerns of conventional nuclear reactors. Called Small Modular Reactors (SMRs), these plants,would be inherently cheaper to build and safer to operate than conventional plants.
From snatching carbon dioxide (CO2) out of the air like trees do, to launching giant mirrors into space, scientists are researching a wide variety of technologies to artificially slow global warming.
Lake Mead is at a record low level, a stark symbol of increased water demand and a stubborn drought in the West. Will conditions persist and the reservoir sink farther? Scientist David McGee reveals how he looks for the answers by studying past dry spells.
Comparison of early to mid-summer conditions along the eastern seaboard vs. the West Coast.