renewable energy sources

COSMOS Episode 12: The World Set Free (2014) is a great environmental wake-up call for the citizens of earth. Neil DeGrasse Tyson effectively demonstrates the parallels of the runaway greenhouse effect that occurred on Venus (and the hellish conditions it produced) and what we are currently doing to the earth. Tyson presents solid, scientific evidence to support his claims. But does humanity have the will to take the steps necessary before it is too late?