The most direct path to cutting a gigaton of greenhouse gas emissions might start with a cow's stomach and a specific kind of red seaweed. For CH4 Global, a Nevada-based startup, the math is disarmingly simple: feed a tiny amount of cultivated Asparagopsis seaweed to cattle, and you can cut their methane-laden burps by up to 90% [CH4 Global, Jan 2025]. The hard part, the part that has consumed nearly $50 million in venture capital, is growing enough of the stuff at a price that makes sense for a feedlot operator. In January 2025, the company switched on what it calls the world's first commercial-scale Asparagopsis growing facility, a land-based "EcoPark" on the coast of South Australia [CH4 Global, Jan 2025].
The seaweed wedge
CH4 Global's product, Methane Tamer Beef Feedlot, is a feed supplement that mixes dried, processed Asparagopsis armata into cattle rations. The science behind it is well-established; compounds in the seaweed inhibit the gut microbes responsible for enteric methane production during digestion. At an inclusion rate of just 0.5% of the diet, trials have shown methane reductions exceeding 95% [AgFunderNews]. The company's wedge isn't the science, but the scalable, consistent, and cost-effective supply of the raw ingredient. CH4 Global's answer is vertically integrated, land-based aquaculture, starting with its flagship facility at Louth Bay, which began production in early 2025 [CH4 Global, Jan 2025].
Why Chipotle and DCVC wrote checks
The investor list reads like a who's who of strategic food and deep tech capital. Chipotle's venture arm, Cultivate Next, is an investor, alongside DCVC, Cleveland Avenue, and AgFunder [PitchBook]. The $29 million Series B in 2023 fueled the build-out of the Australian EcoPark and the commercial push [Crunchbase, Aug 2023]. The market they are chasing is vast. CH4 Global has a multi-year partnership with agricultural solutions giant UPL targeting livestock markets in India, Brazil, Argentina, Uruguay, and Paraguay, regions that collectively contain over 40% of the world's cattle [UPL Corp].
Traction beyond the pilot pond
Commercial validation is beginning to surface. In September 2025, Australian producer Windsor Meats sold what it billed as the "first methane-tamed Wagyu" beef from cattle fed the supplement [CH4 Global, Sep 2025]. The product has been recognized by TIME Magazine as one of America's Top GreenTech Companies for two consecutive years and won "AgTech Startup of the Year" in 2025 [CH4 Global, Mar 2025] [CH4 Global, Aug 2025].
Where the wheels could come off
Scaling biology is famously difficult and capital-intensive. The success of the Louth Bay EcoPark as a profitable production node is still unproven. Furthermore, the agricultural supply chain is conservative and price-sensitive; feedlot operators will adopt the supplement only if the cost per head is justified by the methane reduction credits or a premium for "low-methane" beef.
The next twelve months
For CH4 Global, 2026 will be about proving the model it has built. Watch for contracted offtake agreements from major beef producers or food companies, which would signal that the Louth Bay output has a committed home. Another round of funding is likely as the company looks to replicate its EcoPark model in other geographies. The ultimate test will be the volume of Methane Tamer moving through the supply chain and the price per ton it commands.