Source: &quot;Regional disparities in the beneficial effects of rising CO2 concentrations on crop water productivity (doi:10.1038&#x2F;nclimate2995)<p><a href="http:&#x2F;&#x2F;www.nature.com&#x2F;nclimate&#x2F;journal&#x2F;vaop&#x2F;ncurrent&#x2F;full&#x2F;nclimate2995.html" rel="nofollow">http:&#x2F;&#x2F;www.nature.com&#x2F;nclimate&#x2F;journal&#x2F;vaop&#x2F;ncurrent&#x2F;full&#x2F;nc...</a>