Through Infinitree LLC, a B corp. venture, Direct Air Capture technology developer Carbon Sink (also a B corp.) captures carbon dioxide from thin air and recycles it to use in greenhouses. The added CO2 allows the greenhouses to grow more food with less water and less fertilizer.

An evolution of the DAC systems developed by Kilimanjaro Energy, including key staff members, Carbon Sink are targeting sustainable low carbon opportunities for using CO2 captured from the atmosphere today.


The humidity swing CO2 capture process. Image courtesy of Carbon Sink.
The humidity swing CO2 capture process. Image courtesy of Carbon Sink.

Increasing greenhouse yields

With Infinitree LLC, Carbon Sink “irrigates” greenhouses with ambient-sourced CO2 to enhance plant metabolic and photosynthetic rates. Their amine-based chemical sorbent technology leverages greenhouse moisture, not heat, to liberate CO2 from the sorbent material for plants to consume.

Elevated CO2 levels increases plant yields.  Carbon Sink’s system sources CO2 on-site and at less cost than alternative methods of CO2 enrichment.  The system requires little energy, employing two fans.  No other energy is required.

Carbon Sink’s systems liberate CO2 users from expensive and polluting enrichment methods while reducing CO2 concentrations in the atmosphere.

Enabling inexpensive and carbon-neutral biofuel

Economically viable biofuel production depends on low-cost CO2 for cultivating plant feedstocks.  Carbon Sink’s system provides inexpensive CO2, enabling low-cost feedstocks for biodiesel and ethanol production.

Plant and bacteria-based biofuel producers fix more CO2 in feedstocks at lower cost.  By using Carbon Sink’s systems, biofuel producers create more fuel less expensively and with a small production carbon footprint.

Cleaner water

Nitrogen from farm run-off threatens waterways, public health and fisheries. Carbon Sink marries its carbon capture system to aquatic plant growth chambers to purify water.  Aquatic plants thrive in high CO2 concentrations increasing biomass growth rates by eight to ten times (in 1500 parts per million CO2) while boosting nitrogen and CO2 digestion.  Result: cleaner water.

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