The climate had a bad year in 2009. Talks collapsed. Emails were hacked. And several papers found even 50-80% reductions weren’t enough: we had to get to net zero. Yet six years later, negotiators from 190 countries acknowledged the need for net zero in the Paris Agreement, even resolving to try to limit warming to 1.5 °C, which means net zero global emissions around 2050. Can it be done? It certainly can. Will it be done? That’s up to all of us.

A lecture by Myles Allen recorded on 23 May 2023 at Barnard's Inn Hall, London.

The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/watch-now/world-zero

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How the World Agreed on Net Zero

Gresham College Lectures

How the World Agreed on Net Zero