Up to a fifth of our nation’s total energy use goes into growing, transporting, processing and eventually preparing our food. But those energy inputs are often hidden.
Scientists say there is not enough evidence to support the EPA's claim that fracking doesn't cause widespread problems to water resources.
The EPA is now taking public comment on its plan to cut greenhouse gas emissions, and climate activists in the Pittsburgh area are making their voices heard.
A robotics professor at Carnegie Mellon is taking a bite out of vehicle emmissions by helping traffic flow better.
It's not just environmentalists that are backing Obama's new plan to curb climate change. Big box stores like Staples are throwing their weight behind it too.
As the world heads to Paris next month for a new round of climate talks, what are the issues that should shape the debate?