Scientists are constantly looking for creative ways to slow global warming, and now they're turning their attention to the sky. While most San Diegans prefer a sunny day at the coast, local ...

It took a Tucson resident to devise an emergency plan to fend off catastrophic global warming — shade. University of Arizona astronomer Roger Angel, who has spent much of his life building mirrors to ...

Pollution spiked after days of Diwali celebration fireworks, sending PM2.5 levels to over 56 times the safe limit.