In the second of two episodes on geoengineering, we hear the case against trying to reflect sunlight to cool the Earth.

Solar radiation modification has attracted attention and investment in recent years as a way to potential reverse the effects of climate change, but it remains a controversial idea.

We hear from researchers pushing a non-use agreement for solar geoengineering who explain why they believe these types of technologies are a dangerous distraction from what needs to be done to reduce fossil fuel emissions. 

Featuring Chukwumerije Okereke, professor in global governance and public policy at the University of Bristol, and Co-Director at the Center for Climate Change and Development at Alex Ekwueme Federal University in Nigeria and Aarti Gupta, professor of global environmental governance at Wageningen University in the Netherlands. And responses from Shaun Fitzgerald at the Centre for Climate Change at the University of Cambridge in the UK

Listen to the first episode to hear scientists who argue modifying the climate can help buy the world time.

This episode was written and produced by Mend Mariwany and Gemma Ware, with assistance from Katie Flood and sound design by Michelle Macklem. Our theme music is by Neeta Sarl. Full credits for this episode are available. Sign up here for a free daily newsletter from The Conversation.

Further reading:

• Not such a bright idea: cooling the Earth by reflecting sunlight back to space is a dangerous distraction
• Solar geoengineering might work, but local temperatures could keep rising for years
• Blocking out the sun won’t fix climate change – but it could buy us time
• The overshoot myth: you can’t keep burning fossil fuels and expect scientists of the future to get us back to 1.5°C
• Africa has vast gas reserves – here’s how to stop them adding to climate change