Visitors to the 2008 UN climate conference in Poznan, Poland.
WOJTEK RADWANSKI/AFP/GETTY IMAGES
Maps showing rapid Arctic ice loss. This consequence of climate change will ultimately lead to rising sea levels around the world.
President Obama is very supportive of renewable energy and action on climate change. But is the U.S. government ready to act quickly enough to solve our energy problems?
LAURA RAUCH/GETTY IMAGES
Among its benefits, the solar revolution will provide a source of labor-intensive jobs, such as installing PV panels.
PHOTO: JOHN KEITH/ISTOCKPHOTO
Climate activists form the number 350. Many scientists estimate 350 parts per million as the highest safe level of carbon dioxide in the atmosphere. Current levels are about 387 parts per million.
Wind turbines are a good alternative to carbon dense fuels such as coal.
Engineers are developing advanced batteries for new hybrid-electric vehicles.
GM CORP/JOHN F. MARTIN
An energy-efficient train in Japan. The United States could benefit from a highly efficient light rail system.
Can we reduce greenhouse gases enough to avoid the worst effects of global climate change? Scientists warn that we don’t have much time to act.