Environment & Energy
Related: About this forumZinc, Iron, Protein Content Drop 3% - 9% In Wheat, Rice Grown At 550+/- PPM CO2 In Test Plots
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Reporting in the journal Nature, researchers said they had tested 41 strains of six crops grown in open fields at seven sites in Australia, Japan and the United States, where plants were exposed to higher levels of CO2 released through horizontal gas pipes.
Normal air has CO2 concentrations of around 400 parts per million (ppm), which is currently rising at around two or three ppm annually. In their "carbon-enriched" environment, the experimental plants grew in conditions of 546-586 ppm of CO2 -- a figure that under pessimistic scenarios may be reached by as soon as mid-century.
It translates into warming of more than three degrees Celsius (5.4 degrees Fahrenheit) over pre-industrial levels; UN countries have vowed to limit temperature rise to 2 C.
Zinc, iron and protein concentrations in wheat grown at the sites were reduced by 9.3 percent, 5.1 percent and 6.3 percent compared with wheat grown in normal conditions, the scientists found.
In rice, levels of zinc, iron and protein tumbled by 3.3 percent, 5.2 and 7.8 percent, although the figures varied widely across the different strains that were tested.
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http://www.seeddaily.com/reports/Climate_Rising_C02_levels_to_hit_grain_nutrition_999.html
Judi Lynn
(160,508 posts)CO2 Producing Hollow Food
By Stephen Leahy
UXBRIDGE, Canada, May 7 2014 (IPS) - Rising carbon dioxide (CO2) levels will make many key food crops like rice and corn less nutritious, a new study shows.
Important food crops will contain lower levels of zinc and iron by mid-century without major cuts in CO2 emissions from burning fossil fuels, an analysis of field experiments conducted on three continents has found.
Two billion people already suffer from low levels of zinc and iron. Its an enormous global health burden today, said Samuel Myers of the Harvard School of Public Health in Boston, co-author of the Increasing CO2 threatens human nutrition study published in the journal Nature Wednesday.
Deficiencies of zinc and iron have wide range of impacts on human health, including increased vulnerability to infectious diseases, anemia, higher levels of maternal mortality, and lowered IQs.
More:
http://www.ipsnews.net/2014/05/co2-producing-hollow-food/
Crash2Parties
(6,017 posts)to use government funding to help poor Monsanto see humanity through this crisis.