Some claims about cutting greenhouse gases – by businesses, countries and even the football World Cup – may be hot air. Dynamic new technology holds the key to verifying the data, stashing it securely, and unleashing its full potential. By Arka Rey and Sean Penrith

A carbon tax does not a model country make. In the case of France and Sweden, it obscures issues of outsourced emissions, historical responsibility for climate change and the social inequality, argues Fabrice Flipo. By Fabrice Flipo

Would renegotiating the Paris Agreement be an opportunity to craft a binding and enforceable agreement, asks North-West University's Ilyayambwa Mwanawina. By Ilyayambwa Mwanawina

No President, no problem: Following Trump's announcement that the US would quit the Paris Agreement, mayors around the world are pledging to step up. Here's why cities care about climate change and how that's a good thing for all of us. By Nandan Sharalaya