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Of forms of food production which are low impact and low yield or high impact and high yield, but it's bringing the two best aspects together. low impact, high yield is what we desperately need to be looking for if we are to feed the world, without devouring the planet. but the detail matters. one of your recommendations, for example, as i understand it, is the perennial crops, replacing those that have to be annually planted and reared. all of the evidence i've seen suggests that by year three orfour, these perennial crops are yielding in much reduced ways. therefore, your argument about low ...

In other words, earth systems would completely collapse. we've been dealing in pictures. we've been looking at things which we think are beautiful, when we should be dealing in numbers. we should be considering what the numbers tell us. and what i'm looking for throughout this is forms of food production which are low impact and high yield. now you can point to plenty of forms of food production which are low impact and low yield or high impact and high yield, but it's bringing the two best aspects together. low impact, high yield is what we desperately need to be looking for if we are to feed...

Farming is extremely low yielding. if that was the way we were to produce our food, we would need several planets to do it and there'd be no space for wild ecosystems at all. in other words, earth systems would completely collapse. in other words, earth systems would completely collapse. we've been dealing in pictures. we've been looking at things which we think are beautiful, when we should be dealing in numbers. we should be considering what the numbers tell us. and what i'm looking for throughout this is forms of food production which are low impact and high yield. now you can point to plen...