Grazing lands represent the largest and most diverse land resource-tak ing up over half the earth's land surface. The large area grazing land occupies, its diversity of climates and soils, and the potential to i mprove its use and productivity all contribute to its importance for s equestering C and mitigating the greenhouse effect and other condition s brought about by climate change. The Potential of U.S. Grazing Lands to Sequester Carbon and Mitigate the Greenhouse Effect gives you an i n-depth look at this possibility.