Newshour Extra

As human activities rapidly transform the planet, the global insect population is declining at an unprecedented rate. In the UK, a recent survey suggested the number of flying insects have fallen by almost 60% in less than 20 years. Some are calling it an impending 'insect apocalypse'. Their disappearance matters because insects are the most diverse group of organisms on the planet and the foundation of every freshwater and land based ecosystem. They provide food for birds, bats and small mammals; they pollinate around 75% of the crops in the world; they replenish soils and keep pest numbers in check. You may not always like insects in your personal space but you certainly need them to survive. Insect population collapses could mean significant crop failures, collapsing food webs, bird extinctions, disease outbreaks and more. We're going to explore why it's happening and what can be done to mitigate it. Shaun Ley is joined by: Dr Erica McAlister - Principal curator of fleas and flies at the Natural Histo