direct link to the article
link to the original study
Basically, increased co2 concentration in the air makes plants make more carbohydrates, but not take in more nutrients from the soil, so they grow faster but have a lower density of vitamins and minerals. Plus, they're "breathing" more efficiently and actually using slightly less water, so they're taking in even fewer nutrients. And the faster growth can't make up for the rates of damage due to climate instability (droughts, floods, extreme heat etc).
The research shows approximately a 3% drop in nutrient density since the 1980s, particularly in carbohydrate heavy crops (like most starchy staple foods), but so many people around the globe depend on those crops for over half their diet that it's very easy for them to fall into malnutrition without access to more expensive shit like enriched products, supplements, and even just fruits and vegetables. Like all the effects of the climate crisis, this impacts those least responsible first.
















