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China wants to lead the climate-change fight. It better solve its milk problem.

Chase Purdy
China wants to lead the climate-change fight. It better solve its milk problem.

In its effort to lead the global push against climate change, the world’s second-largest economy has assigned soldiers to tree-planting duty, spent billions of dollars on cleaner energy (pdf), and has actively pushed some of its cities away from using coal. Still, China has yet to figure out what to do about one of its…