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San Bernardino County, Calif., is creating a commuter train that reaches the small city of Redlands. While good for the environment, some residents worry it will undo the city's slow growth measures.

The researchers say the problem is that the animals' primary source of food is moving farther away from places where they can breed. They're likely going to have to swim farther for their dinner.

The record-breaking heat in the Southwest has killed some of Arizona's famous saguaros. Scientists are looking for ways to ensure the cactus can survive in a warming climate.

With the climate getting hotter, scientists are finding that cutting fossil fuels may not be enough. Carbon dioxide emissions may need to be vacuumed right out of the air.

Nations are gathering the first week of November to negotiate new climate change pledges. But a new report card from the United Nations says those pledges aren't enough to stop extreme climate change.

The warming climate means more intense rain and dangerous flash floods. In Austin, Texas, officials hope that letting people see the rising waters on their smartphones will help keep them safe.

Beneath the streets of hundreds of North America's oldest cities lies a network of pipes delivering steam heat to office buildings and hospitals. These steam loops could be a clean energy solution.

The program is being run with help from Keep America Beautiful, a conservation advocacy group located in Stamford, and Open Doors, which operates a homeless shelter in Norwalk.

Plants absorb one-third of the planet’s greenhouse gas emissions, but if temperatures keep rising in the next 20 years, plants could become 50 percent…

The justices, in a break from the way they have handled most such cases in the recent past, told the challengers to first litigate their claims in the U.S. Court of Appeals for the District of Columbia.