Geo-engineering: the emergency brake for climate change?

In science and even at the UN, votes are going to call for a very radical technological emergency brake to combat global warming: geo-engineering. These are futuristic techniques to dim the sun or to suck greenhouse gases out of the air on a large scale. It goes from room mirrors to sun nappies to superalgae.

Is this the solution to the climate problem or are the dangers greater than the promises?

Philosopher Jessica van der Schalk and I spoke with Behnam Taebi, professor at Delft University of Technology, researcher at Harvard and scientific director of the Delft Safety and Security Institute.