The prolific writer and activist discusses how she keeps faith while change moves slowly along.

The Urgenda Foundation is suing the Dutch government for knowingly endangering its citizens by failing to prevent dangerous climate change.

The Australian prime minister recently repealed his country's carbon tax, but new data shows that it succeeded in reducing carbon emissions.

The whims of our partisan Congress have repeatedly derailed the world’s attempts to tackle climate change. It could happen again.

There's a full year of difficult negotiations ahead.

Emissions have to be reduced significantly. We’re not on that path yet, but we may be getting closer. That’s why we’ll be watching the news from Lima.

The reluctance of the US and China to make strong commitments has been an oft-used excuse by other countries to not take action.

The surprise agreement aims to double the pace of carbon pollution reduction in the United States.

As the US expands its airstrikes into Syria to combat ISIS, the congresswoman calls for a "full congressional debate and vote on any military action, as required by the Constitution.”

We've rounded up some key news and analysis to help you make sense of the latest chapter in America's "War on Terror."