Rich countries resist increasing their contributions to poor countries that are bearing the brunt of global heating

Talks on a new trillion-dollar global deal to tackle the climate crisis dragged on late into Saturday night, as rich and poor countries fought over how much cash was needed, and who should pay.

Rich countries want to offer only about $300bn out of the $1.3tn a year needed from their own coffers, with the rest to come from other sources including potential new taxes and private investors.