By 2050, Earth will be home to nearly 10 billion people, a
tripled human population during our lifetime. Only 1.8%
of the Earth’s surface is arable land that can be used for
growing crops, a resource not likely to increase, which
means the amount of cropland per person will decline
by 20%. In the face of finite resources and a changing
climate, Frank Mitloehner, at the University of California,
Department of Animal Science, describes why we need
sustainable solutions to the 2050 food challenge.

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