Biodiversity factors.

• Position: Matters of Scale

Biodiversity Factors Time it takes to grow 1 inch of soil 1,000 YEARS Time it has taken to erode and wash away one- 40 YEARS third of the topsoil in the United States Number of fish caught by a single Norwegian 120 MILLION boat in 1986 Number of people in Norway 4 MILLION Kilograms of toxic chemicals that would be 2 MILLION removed from the environment each year if U.S. homeowners reduced their use of pesticides by 10 percent Kilograms of toxic chemicals that would be 700 MILLION removed from the environment each year if U.S. manufacturing firms reduced their releases by 10 percent Number of black rhinos in Africa in the 1960s 100,000 Number of black rhinos in Africa now 2,500 Number of pieces of...