We can avert irreversible climate change

Martin Wolf: action is both essential and affordable — but it demands international leaders’ co-operation. "A renewed presidency for Donald Trump is likely to be nowhere more consequential than for climate change. The coming decades will determine whether the threat of damaging and irreversible change is averted, or not. Without active US engagement, success seems inconceivable. Even with it, it would be unlikely. But, crucially, it would be conceivable." The renowned economist, and the Financial Times' Chief Economics Commentator, contemplates.