The New York Times reports that China's severe air pollution led to 1.2 million premature deaths in 2010. Researchers say, China lost 25 million healthy years to air pollution in 2010. And China's air pollution became worse in 2013. Worldwide air pollution is on track to become the top environmental cause of morality by 2050, surpassing dirty water and lack of sanitation. Air quality is worst in China and India. Chinese officials cut out parts of a 2007 report called "The Cost of Pollution in China." How do you feel about air pollution?