China’s international trade and air pollution in the United States User nastratin, in the The Dismal Science subreddit, 02 Jul 2014
China’s International Trade and Air Pollution in the United States: Chinese air pollution related to production for exports contributes, at a maximum on a daily basis, 12–24% of sulfate pollution over the Western United States User lokiikol, in the Reddit Science subreddit, 23 Jan 2014