Indonesia, one of the world’s biggest carbon polluters, said on Monday it would cut greenhouse gas emissions 29% by 2030 compared to what it is currently on course for.

The announcement was one of the last big climate plans from a rapidly-developing economy to be unveiled ahead of a summit in Paris in December aimed at limiting warming to 2C.

Indonesia said it was prepared to cut emissions by 41% from a ‘business as usual trajectory’ if it received financial and technological support from industrialised countries. Jakarta put the price tag on that support at $6bn (£4bn).

But the World Resources Institute, a leading environmental thinktank, said it was near-impossible to judge the scale of Indonesia’s ambition or how it would actually meet those goals because the country was so vague in its submission to the United Nations.