Increasing CO2 may threaten human nutrition If you needed even more reason to do something about global warming. This is something I’ve always been passionate about especially since watchinh the movie “The Day After Tomorrow” - if you haven’t watched do so this weekend and then come back and thank me.

According to the UN, wheat, rice, and maize—a mere three out of the Earth’s 50,000+ edible plants—provide 60 percent of the world’s plant-derived food energy. In the developing world, they provide up to 70-80 percent of the energy in a person’s daily diet. These crops are key providers of micronutrients like zinc and iron, which they draw up from the soil.
As we continue to spew carbon dioxide into the atmosphere, however, we may be less able to rely on these crops. A meta-analysis indicates that grains and legumes grown at elevated CO2 levels have lower concentrations of zinc and iron, and some crops also have reduced protein levels.