Saving tropical forests: Value their carbon and improve farming technology

In a warming 21st century, tropical forests will be at risk from a variety of threats, especially the conversion to cropland to sustain a growing population. A new report this week in the Proceedings of the National Academy of Sciences Early Edition shows that crop productivity improvements and carbon emission limits together could prevent widespread tropical deforestation over the next 100 years -- but if relying on either one alone, the world is at risk of losing many of its tropical forests.

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