11 class Geography Notes In Hindi Chapter 16 Biodiversity and Conservation अध्याय - 16 जैव विविधता एंव संरक्षण
CBSE Revision Notes for CBSE Class 11 Geography Biodiversity and Conservation Biodiversity and Conservation. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. Before the advent of humans, our earth supported more biodiversity than in any other period. Since, the emergence of humans, however, biodiversity has begun a rapid decline, with one species after another bearing the brunt of extinction due to overuse.