"Habitat destruction is at the top of the ways human activity is destroying biodiversity. NASA
"Habitat destruction is at the top of the ways human activity is destroying biodiversity. NASA has found that about five percent of the Earth's land surface is burned every year."
Source: Wilson, Dr. Edward O. "The Future of Life." Presented at the National Conference on Science, Policy, and the Environment, Washington, D.C., December 6-7, 2001. (Verified 04/18/14).