EnergyDecember 4, 2017
Shape-Shifting Metals Could Generate Electricity from Wasted Heat
A prototype waste-heat engine runs by cycling hot and cold water through its pistons
Stories by Nick Stockton
Climate ChangeNovember 9, 2017
U.S. Cities and States Try to Keep Washington’s Climate Promises
Mayors, governors and CEOs tell world leaders the Trump administration does not speak for them