Kassie Siegel

Polar bears are in deep trouble. Without help, more than two-thirds of these amazing animals, including all the polar bears in Alaska, will likely be gone by 2050 -- driven off the planet by diminishing sea ice.

So it boggles the mind that the Obama administration recently announced plans to...

The hard truth about the this year's climate conference in Durban, South Africa, is that the outcome -- essentially committing to make an agreement a few years down the line to start cutting emissions a decade from now -- is horrendously inadequate for the scale and immediacy of the climate...

This week I'm out on the tundra in Wapusk National Park in Manitoba, Canada, on the shores of western Hudson Bay, for educational webcasting and blogging with Polar Bears International. Polar bears gather in this area every fall, waiting for the bay to freeze...

On Monday, a federal judge struck down a Bush administration rule that prohibited regulation of greenhouse gases under the Endangered Species Act to save polar bears from extinction. That provision has, since 2008, been the biggest hurdle to using all possible means to address the most pressing threat...

You've changed your light bulbs. You ride your bike or take public transportation. But averting the impending climate disaster requires more. We already have a proven-effective, time-tested law for dramatically reducing greenhouse gas pollution: the Clean Air Act. We need our national leaders to use it.

Unfortunately, the Obama administration...

You can say this for 2011: There's never been a year quite like it.

Dangerous summer heat waves scorched the Midwest and East with record-high temperatures, causing at least 64 deaths. An unprecedented drought in Texas forced the government to declare the entire state a

The onset of the Obama administration was supposed to mean a lot of things, including an end to the Bush-era war on science, especially when it came to climate change and endangered species. No agency needed these changes more than the Department of the Interior, which among other things was...