Mark Watts is Executive Director of C40 Cities, a global network of nearly 100mayors of the world’s leading cities united in confronting the climate crisis. C40cities represent 25% of global GDP and hundreds of millions of residents.Named as a TIME100 climate leader in 2023, Mark helped establish C40 in 2005during his time in London city government, and was appointed Executive Directorof the organisation in 2013. Since then, C40 has grown rapidly in scope andambition. Under his leadership, C40’s 400+ global staff are focused on showingthrough city leadership how the world can halve global fossil fuel use by 2030while creating millions of good green jobs and reducing inequality.Mark has been a thought leader and doer on climate for years, working in boththe private sector and city government before joining C40. Mark was previously adirector of the pioneering consultancy firm Arup’s energy and climate team, andbefore that was the climate and sustainable transport adviser to the Mayor ofLondon where the London Evening Standard described him as “the intellectualforce behind Ken Livingstone’s drive to make London a leading light of the battleagainst global warming.”Mark holds a Masters in History and Politics from the University of Nottingham. Inhis spare time, Mark enjoys running up and down mountains, and live music.