Reader Comments

Post a new comment on this article

Revised estimate

Posted by dougwyu on 16 Feb 2011 at 02:30 GMT

210×1012,
http://plosone.org/article/info:doi/10.1371/journal.pone.0013015#article1.front1.article-meta1.abstract1.p1

The updated figure is US$ 28.8 x 10^9 (billion).

Kirkby, C. A., B. Day, K. Turner, B. S. Soares-Filho, H. Oliveira, and D. W. Yu. 2011. Closing the ecotourism-conservation loop in the Peruvian Amazon. Environmental Conservation 38.

No competing interests declared.