Learn about the signs and science of climate change - and some solutions - in this special issue from National Geographic.
This special issue is sold out.
See how much carbon your household appliances put into the atmosphere - and what you can do about it.
Carbon Diet: Now It's Personal
Three families try to cut their energy consumption to 80 percent of the average American family's.
Are your electronics drawing power from the grid when you think they're turned off? Take a quiz to find out.
See photographer Jodi Cobb's images of middle-class families, worlds apart, with very different carbon footprints.
Surface temperatures on Earth are warming at a pace that signals a decisive shift in the global climate.
Aspen Environment Forum
Watch interviews with scientists, explorers, and other leading thinkers on climate change.
Green Guide: Climate Quiz
How much do you know about the effects of global warming? Take a quiz to find out.
Drying of the West
The American West was won by water management. What happens when there's no water left to manage?
The lands of perpetually frozen earth reveal the delicate rhythms of the planet. But will permafrost stay permanent?