The recent news that the Earth's population could hit 11 billion by the end of the century should give anyone pause.
Maybe we are capable of feeding all those mouths with current agricultural technology, but what if large chunks of farmland are rendered unusable by climate change? These are the questions Joel K. Bourne, Jr. considers in his book "The End of Plenty: The Race to Feed a Crowded World."
It's not all bleak; Bourne reports on efforts to get the maximum yields out of the minimum lands, while still protecting the planet. He visits the Exchange with details of what he found.