In the wee hours Sunday at the United Nations climate talks, countries from around the world reached an agreement on how rich countries can cough up the funds to support poor countries in the face of climate change.

The financing plan, which calls for $300 billion per year in support for developing nations, was immediately assailed as inadequate by a string of delegates.

Amid climate change, campaigners lament shortfall in help to poorer countries to switch to low-carbon economies, and decry influence of Saudi Arabia, Azerbaijan and looming Donald Trump presidency