EditorialFILE -- Workers at a processing plant making magnetic powders and products using rare earths in Tianjin, China, in 2013. (Sim Chi Yin/The New York Times)
EditorialFILE -- Workers at a processing plant making magnetic powders and products using rare earths in Tianjin, China, in 2013. (Sim Chi Yin/The New York Times)
EditorialFILE -- Workers at a processing plant making magnetic powders and products using rare earths in Tianjin, China, in 2013. (Sim Chi Yin/The New York Times)
EditorialFILE -- Workers at a processing plant making magnetic powders and products using rare earths in Tianjin, China, in 2013. (Sim Chi Yin/The New York Times)
EditorialFILE -- Workers at a processing plant making magnetic powders and products using rare earths in Tianjin, China, in 2013. (Sim Chi Yin/The New York Times)