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NASA satellite images show China as the most polluted country in the world

NASA satellite images show China as one of the most polluted countries in the world. According to NASA, China has seen a dramatic increase in pollution in the past decade. On Dec. 19, Beijing issued its second red alert for pollution in a month. China, the world’s growing manufacturing hub, saw an increase of 20-50 percent in nitrogen dioxide. World Health Organization says nitrogen dioxide is a threat to respiratory health. People in Beijing wear masks for protection. At COP21 meet, governments from 195 countries agreed to keep global warming below 2 degrees Celsius.