The flaw in Britain’s net-zero plan

The COP26 summit is unlikely to be an outright flop. There has been no shortage of drama, with speakers seeming to compete with each other to see who could use the most histrionic language. Justin Welby, the Archbishop of Canterbury, went so far as to compare the attending leaders to Nazi appeasers. He later apologised.

Some progress, albeit small, is being made. A hundred countries have been persuaded, some on the promise of sweeteners worth £14 billion, to sign a pledge to end deforestation by 2030. Brazil, the most important of all, is among them. India has agreed, for the first time, to set itself a date for achieving net-zero greenhouse gas emissions — although its target, 2070, is two decades beyond what the United Nations would have liked. Most leaders at Glasgow will be dead by then.

One thing is unlikely to have changed by the end of the two-week conference.