Environmental campaigner Bianca Jagger throws weight behind initiative to restore barren land to forest . The Bonn Challenge was launched in September last year with the aim of helping achieve the goals of the United Nations REDD+ program and Target 15 ( there are 20 in total ) of the Convention on Biological Diversity , which was signed by 150 governments at the first Rio Earth Summit in 1992 . The environmental group , IUCN enlists Jagger to promote Plant a Pledge campaign in support of Bonn ##er . IUCN receive commitment from Brazilian government at present to restore 15 million hectares of forest . IUCN says that there are ` ` no promises in sight '' after Kyoto Protocol expires in December 2012 .
Environmental campaigner Bianca Jagger throws weight behind initiative to restore barren land to forest . The environmental group , IUCN enlists Jagger to promote Plant a Pledge campaign in support of Bonn ##er . IUCN receive commitment from Brazilian government at present to restore 15 million hectares of forest . IUCN says that there are ` ` no promises in sight '' after Kyoto Protocol expires in December 2012 .