The fossil fuel industry is backing a network of astroturf organizations trying to derail green initiatives in five Western states.

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.

Years of heavy investments in renewable energy technology appear to be paying off.

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.

By 2016 solar power will be as cheap or cheaper than electricity from the conventional grid in every state except three.

Dire warnings about sky-high electricity bills haven't come true.

To avoid catastrophe, we must seize corporate polluters’ wealth. And to do that, we must change everything.

Some Silicon Valley companies are taking issue with the conservative group's policy positions on climate change.

Watch Bill's interviews with a range of leaders, thinkers and doers on the front lines.