A silver lining to the toxic cloud: the global recession has cut demand for products which in turn has cut industrial production which in turn has cut the greenhouse gases that contribute to global warming. (via Foreign Policy)

Global warming could force 200 to 700 million people from their homes by 2050, triggering the "greatest migration in history," according to a report by CARE International.

President Obama's energy secretary, Steven Chu, says Americans are in denial about global warming: "We're looking at a scenario where there's no more agriculture in California. I don't actually see how they can keep their cities going."

Global warming is largely irreversible over the next 1,000 years, according to a report by the U.S. National Oceanic and Atmospheric Administration.

Rising temperatures and droughts caused by global warming are causing trees in the West to die twice as fast as they used to, according to a study by the United States Geological Survey.

Last month was the second warmest October in history since records of monthly temperatures began in 1880.

In an effort to combat global warming, New York City will join 20 other U.S. cities to measure the carbon footprint of its municipal services, including fire and police departments, government buildings and waste services. Paul Dickinson, CEO of the Carbon Disclosure Project: "If you don't measure these emissions, you cannot manage them."

American retailers like Wal-Mart, Kohl’s and Whole Foods Market are installing solar panels on roofs of their stores not only to cut electricity costs, but to meet a December 31 deadline for tax incentives.

Global warming has caused an eight-square-mile ice chunk to break off from the Ward Hunt Ice Shelf in Canada, the largest piece to fall off from the region in three years.

Antarctica's Wilkins Ice Shelf, which previously lost an ice chunk the size of Manhattan in March, is "hanging by its last thread" due to global warming, according to a press release by the European Space Agency (ESA).