A three-degree rise in global temperature is the current estimated ‘tipping point’, after which global warming could run out of control, leaving us powerless to intervene. The Paris Agreement on climate change estimated that gas emissions need to peak in the next five years, which could be an improbable goal.
Geoengineering, a deliberate large-scale intervention in the Earth’s natural systems, for example injecting sun-blocking particles into the atmosphere, could be a plan B. But how feasible is such an ambitious project and how would it be regulated? Join human rights expert Dr Sam Adelman, Carbon Brief editor Leo Hickman and Dr Matthew Watson who led the SPICE (Stratospheric Particle Injection for Climate Engineering) Project to discuss geoengineering and its potential global impact.