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The Intergovernmental Panel on Climate Change’s (IPCC) newest installment, Working Group III (WGIII): Mitigation and Climate Change, highlights an important message: It’s still possible to limit average global temperature rise to 2°C—but only if the world rapidly reduces emissions and changes its current energy mix.

We've outlined six things you need to know about the level of emissions reductions needed to rein in runaway warming.

The first installment of the Intergovernmental Panel on Climate Change’s (IPCC) Fifth Assessment Report (AR5)—released in September—confirmed the overwhelming scientific consensus that the world is warming, largely due to human activities. The Working Group II (WGII) report, released today, takes this finding a step further: Not only is climate change happening, but every continent on earth is now experiencing its impacts.

When President Obama addresses the nation later today, climate change is expected to be featured. The president recently said that one of his personal passions is “leaving a planet that is as spectacular as the one we inherited from our parents and our grandparents.” The next two years will determine if his administration can meet this standard.

Earlier today, the Intergovernmental Panel on Climate Change (IPCC) released the Summary for Policymakers of Working Group I’s (WGI) portion of the 5th assessment report (AR5) on climate change. The report, focused on the physical science of our climate system, confirms the overwhelming scientific consensus that the world is warming and human activities are responsible. Without immediate action to curb...

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