As world leaders head to Cornwall this week for the first G7 meeting in two years, Prime Minister Boris Johnson aims to use the summit to “unite leading democracies to... create a greener, more prosperous future”. Johnson’s words are hardly unexpected. Talk of “building back better” has been ubiquitous since the Covid crisis began. The world is also preparing for COP26, arguably the most important set of climate talks since the Paris Agreement, taking place in Glasgow in November. Reports on 9 June of a UK call for a new "Marshall Plan” – named after the US economic programme that helped rebuild European economies after the Second World War – suggest at least some political willpower to step up the climate fight.