1. Recycling waste;SMITH P.I.S.,1976
2. Recycling solid waste, the first choice for private and public sector management;DUSTON T.E.,1993
3. Taking out the trash;CARLESS J.,1976
4. Global warming, river flows and water resources;ARNELL N.,1996
5. The collapse of the Kyoto Protocol and the struggle to slow global warming;VICTOR D.G.,2004