How about the great minds stayed at home and no discussion was had, stimulated or otherwise. Where's Andrew Neal when you need him
I'm sure if he were to address these dickhead dilettantes concerned and green aware VIPs, he might suggest that if they wish to be taken seriously they ought to just stay where they are instead of flitting about the world prattling on about climate change because WE ALL KNOW now, flying is a great pollutant. As one of those spearheading Extinction Rebellion's London demos informed us, all air travel should only be used in emergencies, as per his own trips shown on his Instagram, Maldives, skiing , essential stuff like that. I bet not one of the attendees at that conference made the wonderful deferential aside "if I could fly clean I would" that Emma magnanimously informed she would do, if she could, but sadly she can't 
Bah! to the lot of them. Go back to where you came from and write a 100 lines, or today's equivalent of that, plant a 100 trees!