Episode 6: Carbon offsetting: after two decades, has it really taken off?

High carbon lifestyles are a driver of climate change and tourism is a prominent feature of high carbon lifestyles. Carbon offsetting emerged as a possible solution almost 20 years ago. Airlines began to offer offsetting as an option for travellers to resolve their personal air travel emissions, but it never really took off. Despite becoming central to many airlines' environmental commitments, very few passengers ever opted to offset their emissions. So what is carbon offsetting? What are its merits and where has it got us?