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UN climate chief Christiana Figueres, shown here in 2010, told governments to prepare for a gap on the expiry of pledges under the Kyoto Protocol, which has formed the foundation of the world's efforts to cut carbon emissions. Commitments by most developed countries to cut emissions are likely to expire at the end of next year without a new round of legally binding pledges, she warned.

The Purdue Solar Racing team's solar-powered urban commuter car achieved the equivalent of almost 2,200 miles per gallon in the 2011 Shell EcoMarathon international competition this week in Houston.

A European drive to forge a legally-binding deal on climate change by 2015 that would include all major carbon polluters is "too much", a senior Chinese negotiator said at UN talks here.

Signing a legally binding treaty that would force emissions reductions throughout the world is not likely in the near future, according to U.S. State Department Special Envoy for Climate Change Todd Stern, who visited MIT last week. But that shouldn't stop the United States from moving forward in addressing climate change issues, he said.

Stopping people fishing around Caribbean coral reefs by designating them legally protected marine reserves could help some of them survive the effects of a changing climate by more than 50 years.

We tend to think of our cell phones as our own person technological domains. They are the places where we can store our digital life and keep an eye on the things that we need to, while we are on the go. But, what if your data is not you own, what if it is used against you in a court of law?