A staff member of the Beijing Municipal Environmental Protection Monitoring Center works at its monitoring room of the air quality forecast and warning center in Beijing, China, May 21, 2015. Apple Inc is planting trees, Mars may move to “zero carbon” and Foxconn Technology Co Ltd is spending millions of dollars to give its factories a “green” makeover, as companies operating in China face tighter rules on pollution. (Photo by Kim Kyung-Hoon/Reuters)
