Although our national infrastructure is in desperate need of an update, scientists warn that more building isn't always better.

According to a recent letter signed by the world's leading farmers, environmentalists, philanthropists, and scientists, the large infrastructure projects planned in the next 15 years could have a disastrous effect on our planet.

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What happens when the news media stops covering news objectively - and instead becomes a source of very specific opinions that serve a very narrow agenda?

For example - in the case of the democratic primary - consider the news coverage of the mere possibility of Vice President Joe Biden challenging Hillary Clinton for the Democratic Party's nomination for president.

As President Obama tours the Arctic to raise awareness about global warming, we’re getting new evidence about just how dire a situation our planet is in.

In preparation for this fall’s big climate talks in Paris, 56 countries have come out with their own national targets for cutting greenhouse gasses.