http://news.google.com/news/url?sa=t&ct2=us%2F0_2_g_12_0_t&bvm=list&usg=AFQjCNGWibkaaNhbsAtj8m46eEI0ETwOTA&cid=8797592177499&ei=i-6QTKi0BuLllQeJwZ2eAQ&rt=HOMEPAGE&vm=STANDARD&url=http%3A%2F%2Fwww.nytimes.com%2F2010%2F09%2F15%2Fus%2F15farm.html as per last sentence mzei will be both a scientific and a political decision