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More CO2 in the atmosphere is making food crops more calorific, less nutritious and potentially more toxic

Published

2 months ago

November 28, 2025

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More CO2 in the atmosphere is making food more calorific, less nutritious and potentially more toxic. If we do not intervene, this can lead to malnutrition, even in population groups that currently have enough to eat. These are the findings of the Leiden study published in the journal Global Change Biology.

Someone who eats a healthy diet of rice and tomatoes today may not be getting enough essential nutrients in the future. The increase in CO2 in the air is reducing the nutritional quality of crops: they contain less zinc, iron and protein, for example. These nutrients are decreasing by an average of 4.4%, but some are decreasing by 38%. At the same time, the number of calories is increasing, which can lead to obesity. The concentration of harmful substances such as lead may also be increasing, although more data are needed to investigate this.

Wake up call
All over the world, many people depend on rice or wheat for food. Both crops experience a significant decline in essential nutrients as CO2 levels rise. The decline in nutritional value can have a significant impact on people’s health – even if there is enough food – and can lead to malnutrition. Environmental scientist Sterre ter Haar sees her study as a calling. “With food security, we often think about whether people can fill their bellies or not. Our research highlights that food security also means food security. We have to pay more attention to that.”

Comparing data from different studies
The researchers analyzed and compared crop data from different studies. In these studies, researchers grew crops at various CO2 levels. Although a large amount of data was available, the different concentrations of CO2 used made it difficult to compare the studies. However, the Leiden researchers studied found that the effect of CO2 levels on plant growth was linear: if the CO2 level doubles, the nutrients are also affected. This allowed the researchers to make a baseline measurement, allowing them to compare the data. A total of 43 crops were studied, including rice, potatoes, tomatoes and wheat.

How realistic is this scenario?
Crops for different studies were grown under experimental conditions both indoors and outdoors. How realistic is it that our food will be more caloric, more nutritious and more toxic? “The CO2 level for the baseline measurement was 350 parts per million (ppm) and we looked at what would happen at 550 ppm, the level we can reach in our lifetime,” said researcher Sterre ter Haar. “Today we live at 425 ppm, so we are already halfway through this model.” According to the researchers, the results show that our diet is already less nutritious than it was a few decades ago. In the future we will have to adjust our diet.

More research is needed
The Leiden researchers hope that this study will stimulate further research into the impact of CO2 not only on other crops, but also on whether climate change affects our food differently and how we can adapt crops to climate change. Can we grow them differently in greenhouses, for example? “Fortunately, there is a lot of innovation in the Dutch food sector and we have strong research institutions that can study it,” says Ter Haar. “We can really move forward together.”

You can read the full study at the link here.

Source: University of Leiden

Related Topics:atmosphere calorific CO2 crops food Making nutritious potentially toxic

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New partnership to expand greenhouse drone distribution across Europe

Published

7 hours ago

February 6, 2026

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GeoCue welcomes MOST Robotics to its global distribution network. Based in Germany and serving customers throughout Germany, Austria and Switzerland, MOST Robotics will offer TrueView GO LiDAR solutions and LP360 software, from GeoCue, to surveying, construction, forestry, agricultural and industrial inspection professionals looking for a complete and reliable workflow from data capture to delivery.

Founded in 2021 by Valentin Möller and Lennart Stollberg, MOST Robotics builds on deep UAV experience since 2015, offering integrated turnkey drone and sensor solutions, supported by technical consulting and first-class customer support. Their team works closely with end users to ensure technology works in real-world conditions, from flight planning to endpoint cloud processing, a full-service company for individual solutions.

MOST Robotics is expanding its portfolio of handheld SLAM LiDAR and LP360 software to directly respond to customer needs, especially for projects where flight restrictions, dense vegetation or indoor environments make aerial collection difficult. With TrueView GO and LP360, customers can complement drone surveys with ground-based SLAM capture, process aerial LiDAR and produce high-quality photogrammetric output. This approach supports rapid and accurate classification of large data sets and the creation of highly accurate digital terrain models, helping to reduce office processing time while improving the final quality of delivery.

Valentin Möller, CEO of MOST Robotics, commented: “GeoCue makes UAV LiDAR and SLAM bridges in a way that matches how our customers work in the real world. We spend a lot of time in the field with customers, which gives us practical feedback and clear ideas on what needs to be improved. GeoCue is open to this kind of input, and we’re excited to help shape each of our customers’ missions.”

Samuel Flick, GeoCue’s European Sales Manager, added: “We are delighted to welcome MOST Robotics to the GeoCue distribution network. Their technical depth and customer-first approach make them a strong partner as we continue to grow the LiDAR market in Europe. We look forward to supporting their team as they expand access to the TrueView product line, including aerial, handheld and LiDAR 360 mobile device software.”

For more information:
MOST robotics
https://mostrobotics.com/

GeoCue
https://geocue.com/

Cannabis News

USDA-APHIS grants non-regulated status to two gene-edited hemp varieties

Published

1 day ago

February 5, 2026

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USDA’s Animal and Plant Health Inspection Service (APHIS) recently issued regulatory status review responses for two new gene-edited hemp varieties, determining that they are not subject to federal regulation under 7 CFR part 340. Developed by researchers at the University of Wisconsin-Madison, these gene-edited plants have been found to have no increased risk of plant pests compared to conventional hemp. This federal clearance marks an important milestone in easing the path from laboratory to commercial cultivation of precision-bred industrial crops.

Badger PMR (Dust Resistant) has full dust resistance, and Badger Zero (Cannabinoid Free) is cannabinoid free. The main innovation involves the creation of hemp varieties that are unable to produce THC (tetrahydrocannabinol), the psychoactive compound found in cannabis. Using CRISPR gene-editing technology to turn off specific genes responsible for THC production, the UW-Madison team has solved a major hurdle for the industry. This genetic certainty prevents crops from being “hot” — the term used when THC levels accidentally exceed the legal limit of 0.3 percent — which previously forced farmers to destroy entire fields to comply with federal law.

Beyond THC removal, researchers have also engineered varieties with higher concentrations of CBG (cannabigerol), a non-psychoactive cannabinoid valued for its potential therapeutic benefits. These advances are expected to stabilize the hemp market, providing growers with reliable, high-value and legal-compliant varieties. With the regulatory green light from the USDA, these precision-bred hemp lines are poised to revitalize the industry, providing a safer and more profitable future for farmers across the United States.

For more information:
International Service for the Acquisition of Agricultural Biotechnology Applications
Email: (email protected)
isaaa.org/default.asp

Cannabis News

Kentucky Governor Announces Medical Marijuana Gummies Are Now Available, While Pushing Lawmakers To Approve New Qualifying Conditions

Published

1 day ago

February 5, 2026

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Kentucky’s governor is urging lawmakers to give more patients legal access to medical marijuana, announcing that cannabis gummies can now be purchased at state-licensed dispensaries.

Gov. Andy Beshear (D) said Thursday that his administration has sent a letter urging legislative leadership to pass a bill that lists ALS, Parkinson’s disease, Crohn’s disease, sickle cell anemia, fibromyalgia, glaucoma, terminal illnesses and other conditions as conditions for medical cannabis.

“In most other states that have a medical marijuana program, these are conditions that are covered, and conditions that are deemed appropriate by our board of physicians and counselors,” he said. “Expanding the list could help the approximately 430,000 Kentuckians who currently lack access but face these challenges.”

The governor said state officials are “making great strides” in expanding the medical marijuana program to “increase access for those who are already eligible.”

“We currently have 510 registered professionals and over 18,500 approved cards, and those numbers continue to grow,” Beshear said, adding that regulators are making “steady progress” in accepting businesses at every step of the cannabis supply chain.

“As the supply chain expands, patients are starting to see more options online,” he said. “We can announce that gummies are on the market in Kentucky and showing progress in communities across Kentucky.”

The governor’s latest update comes about a month after he took the podium and said “not happy” with the time it’s taken to roll out the state’s medical marijuana program—but predicts that the pace of patient access will “significantly increase” in 2026.

Also last month, Beshear said two more dispensaries will open their doors “once additional product becomes available.” The The state’s first medical cannabis plant was launched in December.

The governor, who has long championed cannabis reform, he anticipated a market launch that monthwhile claiming that medical marijuana will help thousands of patients find an alternative to opioids for pain management.

He at the end of October it passed the milestone of registering 15,000 patientsbut that has grown significantly in recent weeks.

Beshear previously acknowledged that “it’s taken longer than we would have liked” to sustain the industry since he signed off on legalizing medical marijuana in 2023.

Considering this delayed implementation, he signed an executive order this year to waive renewal fees for patients who get the cards so that they are not charged again before the stores open. And another order he signed to provide protections for qualified patients who obtain medical marijuana outside of Kentucky “will remain in place.”

Beshear announced separately that in May the state launched a new online directory that allows people to see where medicinal cannabis will open next to them

He noted that the state is working to provide access to patients “as soon as possible,” which includes speeding up the licensing process. Last January, so did the governor ceremoniously issued the first medical marijuana cards in the commonwealth.

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Meanwhile, the governors sent a letter to Kentucky’s congressional delegation last yearurging them to “take decisive action to protect the constitutional rights of our law-abiding medical cannabis patients” by repealing the federal ban on possession of firearms by marijuana users.

Bipartisan Kentucky senators introduced similar legislation asked the federal representatives of the state to take corrective measuresBeshear said he agrees but would I would like to see even more significant changes at the federal level.

The federal Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) warned Kentucky residents that in 2024, if they choose to participate in the state’s medical marijuana program, they will be prohibited from buying or possessing firearms under federal law.

Health professionals have been able to Patients began to evaluate the recommendations from the beginning of last December.

While there are currently no operational dispensaries for patients, Beshear also confirmed that an executive order he signed in 2023 will be in place in the interim, protecting patients. Those with medical cannabis purchased from licensed out-of-state retailers.

In the November 2024 election, Kentucky also saw more than 100 cities and counties pass local ordinances to allow medical cannabis businesses in their jurisdictions. The governor said the election results show that “the jury is no longer out” on the issue this is clearly supported by voters across party and geographic lines.

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