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 ...