Potent greenhouse gas more prevalent than thought.

• Environmental activists were “suspected of involvement in terrorism.”

Reader support makes our work possible. Donate today to keep our site free. All donations TRIPLED!

Toys containing banned substances are still on the market.

Asian beetle threatens three New England industries.

Grist thanks its sponsors. Become one.

India shops for coal in Appalachia.

Must-see green American landmarks.

• Many mass transit systems plagued by too many riders.