More important, polypropylene is about 30% less dense than PET, Musgrave notes, and thus less resin is needed to make parts. Proponents claim both financial and environmental benefits.

We’re all used to plastic made from corn, but a new source for biodegradable plastics (and plastics not made from fossil fuels) might be tree sap.

Eight million tons of plastic end up in our oceans every year. What it's done to this island is a stark warning.

Recycling polyolefin plastics is inefficient and costly because their strong bonds make them hard to break down and require tedious pre-sorting. The future of plastic recycling may soon get much less ...

Plastic is cheap to make and shockingly profitable. It’s everywhere. And we’re all paying the price.

We Made Plastic. We Depend on It. Now We’re Drowning in It. The miracle material has made modern life possible. But more than 40 percent of it is used just once, and it’s choking our waterways.