Embrace what may be the most important green technology ever. It could save us all | George Monbiot

Never mind the yuck factor: precision fermentation could produce new staple foods, and end our reliance on farming

So what do we do now? After 27 summits and no effective action, it seems that the real purpose was to keep us talking. If governments were serious about preventing climate breakdown, there would have been no Cops 2-27. The major issues would have been resolved at Cop1, as the ozone depletion crisis was at a single summit in Montreal.

Nothing can now be achieved without mass protest, whose aim, like that of protest movements before us, is to reach the critical mass that triggers a social tipping point. But, as every protester knows, this is only part of the challenge. We also need to translate our demands into action, which requires political, economic, cultural and technological change. All are necessary, none are sufficient. Only together can they amount to the change we need to see.