As its CEO, Bill Nye lays out the missions The Planetary Society would like to see NASA focus on over the next 20 years. NASA by nature goes where the future is, and Nye can't help but think of another industry that should follow suit.

Pedal faster, we need the juice! The tech giant is about to become the world's greenest company. Here's how. 

Will this EU power be the first to prove that a modern, industrialized nation can make major shifts towards cleaner, greener energy without catastrophe?

How Costa Rica achieved 100% renewable energy, and what it means.