"A sweeping survey of changes among 32 compounds in 43 crops found that nearly every plant that humans eat is harmed by rising CO2 levels. 'As a scientist, it’s really interesting,' said Sterre F. ter Haar, an environmental scientist at Leiden University in the Netherlands and lead author of the survey, published in November. 'As a person … you don’t want to see such a shift, because it’s so negative.' For the past several years, ter Haar and her colleagues have worked to compile a database of all existing research on nutrient changes linked to rising CO2.... Next the team used their dataset to calculate the nutritional densities of each crop under different carbon dioxide levels — and to predict how their composition could continue to shift in the future. On average, they found, nutrients have already decreased by an average 3.2 percent across all plants since the late 1980s, when the concentration of carbon dioxide in the atmosphere was about 350 parts per million...."
From "Carbon pollution is making food less nutritious" (WaPo). That's a gift link, so you can figure out the science and whether this is a case of lying with statistics.
It occurs to me that percentages of nutrients would change if plants just contain more water, but a plant composed of more water might be more appetizing, so just eat a bit more of it. I'm always suspicious of articles that stir up climate-change anxiety.














