Bob Giddings Green Bay, Wisconsin Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of the contents of the universe, only 5 percent is ...

A green accounting method called “mass balance” certifies that something was manufactured with recycled plastic — just not necessarily much of the bottle making the claim. By Julie Creswell and Hiroko ...

ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. The Environmental Protection Agency has taken the first ever ...

The world’s glaciers are in dire health with almost 40% of their total mass already doomed, even if global temperatures stopped rising immediately, a new study has found. Researchers estimate glaciers ...