This year’s United Nations-sponsored climate talks, widely regarded as the most important climate meeting of the past four years, were postponed on Wednesday because of the coronavirus pandemic.

The session, known as the Conference of Parties, had been scheduled to take place in Glasgow for a week and a half in mid-November. It was postponed to 2021, the world body’s climate agency and the host government, Britain, confirmed late Wednesday.

“In light of the ongoing, worldwide effects of Covid-19, holding an ambitious, inclusive COP26 in November 2020 is no longer possible,” the British government said in a statement.

The conference venue in Glasgow, an arena where tens of thousands of delegates from around the world were to have gathered, is being turned into a field hospital for people with Covid-19, the disease caused by the virus. Covid patients are also being housed in the convention center in Madrid where the Conference of Parties took place last December; Spain has one of the world’s largest outbreaks.