How the numbers are determined:
The World Population clock is derived from US Census Bureau data,
projecting population growth based on recent census estimates. The
Rain Forest Acres Lost clock is based on recent scientific estimates,
using satellite imagery, that approximately 38 million acres of rain
forest land will be destroyed this year. The Species Extinction clock
is a moderate estimate that approximately 100 species are lost each
day (scientific estimates range from 20 to 200 species extinctions
per day, with most estimates in the 100/day range) |
