lunedì 23 marzo 2015

NYT Science: World’s Protected Areas Draw Estimated 8 Billion Visitors Annually

World’s Protected Areas Draw Estimated 8 Billion Visitors Annually
By RACHEL NUWER

A team of British and American researchers has provided what they say is the first global estimate of annual visits to nature areas.

Published: March 24, 2015 at 05:00AM

via NYT Science http://ift.tt/1ED4I8b