David Attenborough once said the world’s ecosystem would collapse if all the bees, wasps, ants and flies were to disappear. So why are we allowing one third of them to be under threat of extinction?  Without insects, we wouldn’t have decomposition, nutrient recycling, seed spreading or pollination. But pollution, intensive farming and habitat loss are causing that to suffer.  All to discuss with Collie Ennis, Biodiversity Officer at Trinity College Dublin.