Read here and here. The UN has become infamous for its scandals, corruption and outright fabricated, manipulative misinformation. The new reigning champion of UN bogus claims (at least those associated with pushing the global warming political agenda) has to be the 2005 blatant misinformation that by 2010 there would be 50 million "climate" refugees as a result of global warming.
"In 2005, the United Nations Environment Programme predicted that climate change would create 50 million climate refugees by 2010. These people, it was said, would flee a range of disasters including sea level rise, increases in the numbers and severity of hurricanes, and disruption to food production."
The claim was such a preposterous bogosity that the UN is now trying to cover it up, and is ineptly failing to do so.
"Only one small problem there UN people, a little annoyance called Google cache, which has that page archived...Fear not dear readers, because as astoundingly smart as those UN people think they are, they forgot one very important yet tiny detail. The map links to a hi-resolution version of the “climate refugee map” and if you delete the page above and the map it contains, you also have to delete the hi-res image it links to...Ooops...I’m always happy to help the UN in times of “need”, sooooo I’ve recovered it and saved it here on WUWT, because that image link is likely to go down the memory hole on Monday."
If anyone really wonders why the UN and leftist/liberal elites are the bastion of climate-lies and science corruption regarding global warming and climate change, all it takes is reading their own words. Those words pretty much explain why climate science has become such an embarrassing disaster and the UN's IPCC a continuous joke on humanity.