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The winner of the Most Rats Gained award goes to Washington, D.C., with a 390 percent increase according to the city’s last decade of data, followed by San Francisco (300 percent), Toronto (186 percent), and New York City (162 percent).

Oh, great: Rat populations are surging as cities heat up Oh, great: Rat populations are surging as cities heat up

By Matt Simon / Grist

nuclear power plant

Will the world fall in love with nuclear power once more? Will the world fall in love with nuclear power once more?

By Matt Simon / Grist

A study of 11,000 twins shows how to make America walkable again A study of 11,000 twins shows how to make America walkable again

By Matt Simon / Grist

A company called Hydrostor pumps water in and out of caverns to store energy generated by renewables.

How giant ‘batteries’ in the Earth could slash your electricity bills How giant ‘batteries’ in the Earth could slash your electricity bills

By Matt Simon / Grist

How do you save a rainforest? Leave it alone. How do you save a rainforest? Leave it alone.

By Matt Simon / Grist

hot train tracks

Taking a train during a heat wave? Watch out for ‘sun kinks’ Taking a train during a heat wave? Watch out for ‘sun kinks’

By Matt Simon / Grist