https://twitter.com/MayorofLondon/status/1532089194646016000

Delighted to be working with

@HillaryClinton

& the Clinton Global Initiative to bring local government, businesses and civil society together to lead the fight against the climate crisis and other global challenges. 1/2

As Chair of

@C40Cities

I know how important cities are in tackling the biggest challenges our world faces, and I’m delighted to be working with a global leader such as Secretary Clinton to lead the fight against this urgent and imminent global threat. 2/2