There's a full year of difficult negotiations ahead.

“While not every traditional variety tastes great or looks great, its genetics may be invaluable 50 or 100 years from now when the climate is different.”

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.