Some weeks the headlines all point downhill. So here's one that points the other way: after forty years of study, scientists say the world's mangrove forests have quietly stopped shrinking — and started to grow again.

When the Mediterranean sun turns relentless, the easiest reflex is to crank the air conditioning and let the meter spin. But staying comfortable doesn't have to cost the earth — or your electricity bill. Here are simple, satisfying ways to keep your home cool this summer using far less energy.