Does a critical mass of outraged citizens qualify as a "major geopolitical shift"? Think of the Vietnam War. Or apartheid, a truly global protest. We may not be there yet, but as climate change impacts get worse, so will the outrage.

The debate over of the Keystone XL pipeline has heated up with the recent release of the U.S. State Department's Keystone XL environmental impact statement, a report many say has serious deficiencies.

A number of state constitutions explicitly gives legislators the responsibility for stewardship of natural resources for the benefit of future generations. Let's make a New Year's pledge to the future. Let's work towards wider adoption of this simple idea.

Earth's forests are its life-support system. Around the globe they are clearly showing telltale signs of run-away carbon emissions and the effects of rising temperatures, prolonged droughts and massive insect infestations.

With the exception of nuclear war, I can't think of any greater existential threat to human civilization than climate change and its related impacts. If ever we needed an "FDR moment," now would be it.

In June alone, 170 all-time high temperature records were broken or tied in the United States, and more than 24,000 daily high temperature records have been broke so far this year.

It may be hard to imagine, but the outer edges of Antarctica were once green, luscious and teeming with vegetation, a new study has uncovered.

The bio-based economy is far more than just bio-fuels. It is also about replacing the oil-based chemicals and materials in cars, shoes or electronic goods, with chemicals and materials derived from renewable biomass

If we could see the world with a particularly illuminating set of spectacles, one of its most prominent features at the moment would be a giant carbon bubble, whose bursting someday will make the housing bubble of 2007 look like a lark.

The market has walked away from conventional coal plants. Should EPA try to hold back the tide of market forces? Should EPA set CO2 standards for new power plants that are twisted to make the coal industry happy?

GENEVA -- Global warming gases have hit record levels in the world's atmosphere, with concentrations of carbon dioxide up 39 percent since the start o...

As temperatures rise and populations get larger, it's clear that breakthroughs in green technology hold the key to the survival of Earth and all the s...

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Despite rapid and substantial growth in the amount of land and sea designated as protected habitat over the last four decades, the diversity of specie...

Beyond the brinkmanship and legal wrangling, Europe's path is clear. The ETS has committed to cutting emissions 21 percent against 2005 levels by 2020.

A promising new technology could provide a powerful weapon in the fight against global warming. From Gizmag: The technology focuses on tapping h...

The Obama administration is making its biggest decisions yet on our energy future, and those decisions are intimately tied to this continent's geography.

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