Feeding the world’s growing population is one of the great challenges of the 21st century. This challenge is particularly pressing in China, which has 22% of the world’s population but only 7% of the global cropland. Synthetic nitrogen fertilizer has been intensively used to boost crop yields in China, but more than 60% of it has been lost, causing severe environmental problems such as air pollution, eutrophication of lakes and rivers, and soil degradation.
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Source: Phys.org