Popping food into the microwave for a couple of minutes may seem utterly harmless, but Europe's stock of these quick-cooking ovens emit as much carbon as nearly 7 million cars, a new study has found.

把食物放进微波炉里几分钟似乎完全无害，但一项新的研究发现，欧洲的这种快速烹饪炉排放的碳量几乎和700万辆汽车的一样多。