In a warmed world, even food won't be as good for you

Even what little you have shall be taken away. "A small but growing body of research is finding that elevated levels of atmospheric carbon dioxide, while increasing crop yield, decrease the nutritional value of plants. More than a hundred studies, for example, have found that when CO2 from fossil-fuel burning builds up in plant tissues, nitrogen (essential for making protein) declines. A smaller number of studies hint at another troubling impact: As atmospheric CO2 levels go up, trace elements in plants (such as zinc and iron, which are vital to animal and human life) go down, potentially malnourishing all those that subsist on the plants."
Oh-oh.
In a warmed world, even food won't be as good for you | By Glenn Scherer | Grist Magazine | Main Dish | 12 Jul 2005:[:food:]