Mostly good comments in here. My take is we have at least 1-2 years of global supply of most grains. This is a completely political problem; its not like we're getting 2012 US Midwest levels of drought in back-to-back years (now THAT would be a crunch). Food waste is a problem, yes. Animal protein is not a problem. There is plenty of land in the US only suitable for grazing. Much better than that synthetic soup of Im…
That's very likely in the current climate change scenario. Look at what's happening in the American South West right now. Lake Mead is currently at unprecedented low levels with no evidence that this will change course any time soon. It's possible within a decade there won't be enough water to run the Hoover dam. That's something no one would have taken as a serious risk 10 years ago.