A cautionary tale about congestion pricing from Sweden, and Mamdani may decide New York City’s future.

Beneath layers of waste, landfills around the US have been reaching scorching temperatures, spewing toxic gases and geysers ...

"We're turning a giant liability into something that's contributing to defense." Researchers attempt incredible feat at toxic ...

When Xcel Energy stopped burning coal at its Valmont Power Station in 2017, it left 1.6 million tons of toxic coal ash on the ...