Summer sale: Save 58%

Yue Maggie Zhou

In this photo taken Friday, Oct. 28, 2016, a layer of smog envelops the city skyline before Diwali festival in New Delhi, India. As north Indian cities enter the season of high air pollution, a new report is warning about the dangers to children. (AP Photo/Altaf Qadri) (AP)

When some US firms move production overseas, they also offshore their pollution

Yue Maggie Zhou