(All photos by Bruno De Lima)

C40 Cities Mayors from across the globe convened this morning to announce that C40 Cities’ existing actions will reduce annual greenhouse gas emissions by 248 million tonnes in 2020 and the potential reduction could be over 1 billion tonnes by 2030. Below are photos from the Mayors' tour of Humanidade 2012 at the Forte de Copacabana, the GHG reduction announcement, and the first of a series of round tables on how cities are paving the way forward on climate change action. Check back on our blog for a wrap up later today and stay tuned throughout the week for more coverage of Rio + C40. 

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