The climate is never out of the headlines. Whether it's another storm wreaking havoc, with heavy rain, wind and flooding; or hot, dry conditions leading to wildfires that burn out of control. The climate is a many-layered debate. Emmanuel Macron recently relaunched his climate credentials with an announcement at Chamonix, on the Sea of Ice glacier that's melting more and more each winter. And such "greenwashing", as it has been dubbed, is not limited to politicians.