Biosphere 2 experiment shows how fast heat could kill drought-stressed trees

Widespread die-off of piñon pine across the southwestern United States during future droughts will occur at least five times faster if climate warms by 4 degrees Celsius, even if future droughts are no worse than droughts of the past century, scientists have discovered in experiments conducted at the University of Arizona's Biosphere 2.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news158861782.html">Biosphere 2 experiment shows how fast heat could kill drought-stressed trees</a></p> <p>Widespread die-off of piñon pine across the southwestern United States during future droughts will occur at least five times faster if climate warms by 4 degrees Celsius, even if future droughts are no worse than droughts of the past century, scientists have discovered in experiments conducted at the University of Arizona's Biosphere 2.</p>