PORTFOLIO

Just as we need clean air to breathe, plants in greenhouses need the right amount of carbon dioxide (CO2) to thrive. What most people don't realize is that in greenhouse farming CO2 levels can drop so low that plants essentially start gasping for air, severely limiting food production.
The current solution creates a troubling paradox: to feed more people, farmers need to inject fossil CO2, directly contributing to climate change. The scale is staggering—European greenhouses alone consume around 50 million tons of CO2 annually, double the emissions of all Swiss cars combined.
fortyfour has developed a breakthrough that transforms this contradiction into an opportunity. Their innovative Direct Air Capture (DAC) technology harvests CO2 directly from the atmosphere using only renewable electricity. Instead of releasing new fossil carbon, their system feeds plants with CO2 that's already in the air—creating a sustainable, closed-loop system.
This technology is deployed next to greenhouses and seamlessly integrates with existing greenhouse operations, precisely maintaining optimal CO2 concentrations between 800-1,200 ppm — the scientific sweet spot for plant growth. By eliminating the need for compression, storage, and transportation of CO2, fortyfour provides greenhouses with a sustainable, cost-effective and self-sufficient solution for boosting food production.

fortyfour has advanced from a laboratory setup to a pilot unit operating since September 2026 at Meier Gemüse, a commercial greenhouse in Aargau, Switzerland. This deployment brings the technology to TRL 6–7 and enables testing under real greenhouse conditions throughout the growing season.
We have developed a non-toxic, biodegradable amino acid salt sorbent, protected as a trade secret. A patent application for the process has been filed with the European Patent Office, with an international PCT filing underway.
Our focus is now on generating field results and validating the performance and economics needed for commercial greenhouse adoption. Next, we aim to scale the technology to meet the CO demand of at least one hectare of greenhouse production, build commercial traction, and refine the system through continued field testing.