The U.N.'s environment agency says the global market for low-carbon and environment-friendly goods and services is projected to almost triple to $2.2 trillion

Here's a look at some key energy terms and technologies.

NASA researchers said Thursday that test flights conducted in California have shown a commercial jet could fly safely with a blend of jet fuel that includes a

What does it take to elevate the common ant from picnic pest to household pet?

Greenland's new government said Wednesday it doesn't plan to issue any new licenses for offshore oil exploration, an announcement that was welcomed by

Two international shipping firms pleaded guilty Thursday to obstruction and other charges in connection with what the U.S. Attorney's Office characterized as a

Pope Francis laid out the priorities of his pontificate during his installation Mass on Tuesday, urging the princes, presidents, sheiks and thousands of

Pope Francis urged princes, presidents, sheiks and thousands of ordinary people gathered for his installation Mass on Tuesday to protect the environment, the

While most Purdue students spent their spring break combing the beaches for fun, another group went down south for a different reason.

A U.N. agency says shark populations in the Mediterranean and Black Sea "have dropped dramatically" over the past two centuries because of overfishing.

A class of Purdue students is working to make the world a better place one community at a time.

Air quality worsened in China's capital and surrounding regions on Thursday, as the country's new leaders geared up for a major congress where public anger has

A royal penguin that became stranded on a beach more than 1,000 miles from its sub-Antarctic home has died at a New Zealand zoo.

An injured female loggerhead turtle is swimming again thanks to a pair of prosthetic flippers.

Arnold Schwarzenegger is praising Austria — and not because it's the country of his birth.