Is Hidden Hunger Looming? Atmospheric Pollution 'Poisons' Food
Rising CO2 in the atmosphere is making agricultural products more caloric but also more toxic and less nutritious. This situation is said to increase the risk of hidden hunger.
It has been revealed that increasing carbon dioxide (CO2) levels in the atmosphere have serious effects not only on the climate but also on the content of the food on our tables. Research led by Leiden University shows that rising CO2 levels are making agricultural products more caloric but with lower nutritional value and potentially more toxic. The findings indicate that the risk of hidden malnutrition could increase even in societies with adequate access to food.
Mineral and Protein Levels are Decreasing
According to the research, a meal considered healthy today may not offer the same nutritional value in the future. Due to increasing CO2 levels, essential nutrients such as zinc, iron, and protein in products are decreasing. Data examined in the study reveals an average decrease of 4.4 percent in these nutrients. In some products, this decline was found to be as high as 38 percent.
Despite this decrease in nutritional value, an increase in the caloric content of products is observed. This means that the same amount of food provides more energy but meets fewer of the body's micronutrient needs. According to experts, this situation could increase the risk of obesity, especially in carbohydrate-heavy diets.
The research also indicates that there may be an increase in the concentrations of some harmful heavy metals, such as lead.
Globally, billions of people rely on rice and wheat as primary food sources. The study shows that rising CO2 levels lead to a significant reduction in essential nutrients in both these products. This implies that malnutrition could increase despite adequate caloric intake.
43 Different Products Examined
Researchers at Leiden University conducted a comprehensive analysis by comparing agricultural data obtained from various studies. In different experiments, crops were grown under varying CO2 levels. The research team found that the effect of increased CO2 on plant nutrient content was linear. This means that when CO2 levels doubled, the change in nutritional value increased proportionally. This approach allowed for comparative analysis across approximately 60,000 measurements, 32 different nutrients, and 43 agricultural products. Among the products examined were rice, potatoes, tomatoes, and wheat.
The study used the period when atmospheric CO2 levels were 350 ppm as a baseline. Researchers modeled how the nutritional content of products would change if this value rose to 550 ppm. It is emphasized that the 550 ppm level is an achievable value by 2065.
According to the results, most nutrients react negatively to the increase in CO2 levels. The average decrease rate was calculated as 4.4 percent. However, in some products, this rate is much higher. For example, the zinc content of chickpeas is predicted to decrease by up to 37.5 percent. In staple food products like rice and wheat, a 'significant' decrease in protein, zinc, and iron levels is expected.
As of today, the atmospheric CO2 level is approximately 425 ppm. This means that about half of the increase predicted in the model has already occurred. According to researchers, this suggests that foods consumed today may already have lower nutritional value compared to a few decades ago.
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