https://archive.is/20240328221739/https://www.theguardian.com/environment/2024/mar/28/vegetables-losing-nutrients-biofortification
https://archive.is/20240328221739/https://www.theguardian.com/environment/2024/mar/28/vegetables-losing-nutrients-biofortification
Vegetable aren't "losing nutrients", they have the same amount as they always did - they're just increasingly bred to be larger so the average concentration of micronutrients goes down.
It's the same for CO2 increases for crops that respond by getting bigger.