livescience.com reports:
Using several models that project habitat changes, migration capabilities of various species, and related extinctions in 25 "hotspots," scientists predict that a quarter of the world's plant and vertebrate animal species would face extinction by 2050.
related:
New List: Top 20 Extinction Hotspots
Global Warming Likely Cause of Worst Mass Extinction Ever
More Frogs Dying as Planet Warms