Somewhat depressing before the Christmas Excess but George Monbiot has written a timely account of the likely human famines to come to our planet (theguardian.com/commentisfree/2017/dec/11/mass-starvation-humanity-flogging-land-death-earth-food). His basic scenario is that postulated increases in the world human population combined with the pressures of climate change and an increased expectation by many societies of eating more animal protein will combine to make famine a common experience for most of humanity. He clearly believes that we are currently imperilling soil fertility, leading to major reductions in basic crops such as rice and maize. He doesn't appear to believe that the seas will be much help as the only things we are not denuding the waters of are plastics.
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