• Gulf of Mexico “dead zone” could be largest on record.

• Toronto cyclists form first-of-its-kind union.

Melting Arctic could spur warmer temperatures inland.

Hybrid batteries in short supply.

Grist thanks its sponsors. Become one.

• Gas-drilling rights to Colorado’s Roan Plateau will be auctioned.

Reader support helps sustain our work. Donate today to keep our climate news free. All donations DOUBLED!