As Earth overheats, scientists test way to repel Sun's rays

As Earth overheats, scientists test way to repel Sun's rays Synopsis Brightening clouds is one of several ideas to push solar energy back into space -- sometimes called solar radiation modification, solar geoengineering, or climate intervention. A little before 9 a.m. on Tuesday, an engineer named Matthew Gallelli crouched on the deck of a decommissioned aircraft carrier in San Francisco Bay, pulled on a pair of ear protectors, and flipped a switch. It was the first outdoor test in the …