The ecosystems of the land and ocean absorb around half our planet warming emissions. But these are being destroyed by human activity. At the same time, climate change is a primary driver of the destruction of these habitats and biodiversity loss. If biodiversity is our strongest natural defence against climate change (as it’s been described), what’s stopping us from doing more to protect it? As the big global biodiversity conference (COP15) gets underway in Montreal, Canada, presenters Sophie Eastaugh and Luke Jones are joined by a panel, including Victoria Gill, BBC science correspondent at COP15 in Montreal; Felipe Zapata, a Colombian botanist at UCLA; Marcela Fernandez from conservation NGO Cumbres Blancas; Akanksha Khatri, Head of Nature Action Agenda at the World Economic Forum Email us: theclimatequestion@bbc.com. Researcher: Frances Read Producer: Georgia Coan Editor: Bridget Harney