In the first study of its kind to resolve whether rising carbon dioxide concentrations are a threat to human nutrition, researchers from the [b]Harvard School of Public Health[/b] have discovered that if levels reach those expected by 2050, crops yielding a large portion of the global population's dietary zinc and iron will have reduced concentrations of those nutrients.
[link url=http://www.medicalnewstoday.com/articles/276432.php]Full Medical News Today report[/link]
[link url=http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13179.html]Nature preview[/link]