Add Yahoo as a preferred source to see more of our stories on Google. Could this common home machinery help usher in more renewable energy? Holden Henry/iStock / Getty Images Plus As summer arrives, ...

As summer arrives, people are turning on air conditioners in most of the U.S. But if you’re like me, you always feel a little guilty about that. Past generations managed without air conditioning – do ...

Johanna Mathieu works for the University of Michigan. She has received funding from the National Science Foundation, Department of Energy, ARPA-E, and the Alfred P. Sloan Foundation. She is affiliated ...