Scientists in Australia analysed 20 years of global data on greenery . globally there 's 4 billion tonnes more carbon dioxide by trees than in Australia . Tree - planting in China , forest regrowth in former Soviet forests and more lush vegetation due to higher rainfall are believed to be behind the rise .
Scientists in Australia analysed 20 years of satellite data on greenery . Found there 's 4 billion tonnes more carbon stored by trees than in 2003 . Tree-planting in China , forest regrowth in former Soviet states and more lush Savannah due to higher rainfall are believed to be behind the rise .