Last night’s State of the Union Address was critically important in a year when there will need to be major international agreement on climate change action.

Have you ever experienced the excitement of getting ready to run a marathon after months of training and preparation? Well, that's exactly how I felt today as I arrived in Lima, Peru, for the next round of UN climate talks. Over the next few weeks, I'll be joining my WWF colleagues on the ground in Lima to encourage international leaders to take bold and necessary climate action

Forty percent. That’s the stunning population loss for polar bears in the southern Beaufort Sea. The news comes from a new study linking the dramatic decline in this polar bear subpopulation in northeast Alaska and Canada to a loss of sea ice due to climate change.

The commitments do represent important leadership, but there is still much work to be done to protect our species and the species we share this planet with from the worst effects of climate change.

To increase chances of conservation success, we must understand traits that make an individual species especially resilient or vulnerable to changes in climate. Different species will be affected in different ways; sometimes negatively, but not always.

Extreme weather events, melting glaciers and rising sea levels—all with links to climate change—are impacting the United States and the world, according to a new report by a group of leading US scientists and released by the White House on May 6.

Earth Hour is just the beginning. You’ve shown the planet you care by turning your lights out for one hour. So what’s next?

One of the world’s largest manufacturers of children’s toys will join the ranks of environmentally friendly companies. The LEGO Group announced in November it will sign on to WWF’s Climate Savers Program.

U.S. companies are in a position to start an amazing race for climate profits. This race won’t happen around the confusing streets of an exotic city, but inside the board rooms and under the factory floors of businesses across America. And the prize? Not a million dollars. But right now at least $190 billion with a B. Everyone who competes can win their share. 

Today Richmond is one of 29 participating cities in WWF's Earth Hour City Challenge. But in the 1970s and 1980s the situation was far different. Pollution from tobacco plantations and chemicals plants had sullied the river to the point where fishing in the James River was banned in 1975.

Our energy choices make a difference. Not just in our homes but for polar bears, snow leopards and every species. Fortunately, solar provides a clean and abundant source of energy. All over the US, people are saving money and the planet by going solar. Learn how with this infographic.