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 ...

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 ...

We obviously can’t put the universe on a giant set of scales, but scientists have found astonishingly clever ways to […] ...

The European plastics recycling industry is at a critical juncture, as emerging regulatory frameworks aim to address the ...

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 normal matter, atoms that make up all ...