Environmental campaigner Bianca Jagger throws weight behind initiative to restore barren land to life . Leading environmental group , IUCN enlists Jagger to promote Plant a Pledge campaign in support of Bonn Challenge . IUCN receive commitment from U.S. government at Rio+20 to restore 15 million hectares of forest . The agreement to reduce greenhouse gas emissions adopted in 1997 is due to expire in December with `` no promises in sight , '' she says . WWF and Greenpeace join forces for Earth Day on April 22 with the goal of planting 1 billion trees worldwide by 2020.
Environmental campaigner Bianca Jagger throws weight behind initiative to restore barren land to life . Leading environmental group , IUCN enlists Jagger to promote Plant a Pledge campaign in support of Bonn Challenge . IUCN receive commitment from U.S. government at Rio+20 to restore 15 million hectares of forest . WWF and Greenpeace join forces for Earth Day on April 22 with the goal of planting 1 billion trees worldwide by 2020.