The Telegraph reported a few days ago that UN Funds were missing over a billion dollars contributed to tackle climate change in developing countries:

“A total of 20 nations pledged up to 410 million dollars (£247m) a year in 2001, resulting in a pot that should be worth well over 1.6 billion dollars (£963m).
But only 260m dollars (£157m) has been paid into two United Nations funds earmarked for the purpose according to the latest figures, the BBC World Service investigation said.
The EU told the broadcaster that the money was collected in ”bilateral and multilateral deals”, but was unable to provide data to back up the claim.
The sums were pledged in the 2001 Bonn Declaration, which was signed by the 15 countries that then made up the European Union, plus Canada, Iceland, New Zealand, Norway and Switzerland.

As of the end of September this year, the two UN funds – called the Least Developed Countries and Climate Change Funds – contained 155.4m dollars and 104.1m dollars respectively, the BBC said.
Boni Biagini, who runs the funds, told the broadcaster: ”These numbers don’t match the 410m per year. Otherwise, we’d be handling billions of dollars by now.”