The first Conference of the Parties under the United Nations climate convention took place in Berlin a quarter of a century ago. By today’s standards, it was a relatively modest affair, involving just a few thousand people, including government officials, scientists, environmentalists and journalists. By contrast, the event scheduled for this year in Glasgow, UK — the 26th Conference of the Parties (COP26) — would have attracted some 30,000 participants. But it has had to be postponed because of the coronavirus outbreak. Last week, we learnt that the delay will last for a year, with COP26 now due to take place in November 2021.