agricultural-waste
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PlantSwitch Bet $28 Million That Nobody Should Have to Eat With a Sad Paper Fork
The founders began by selling greener restaurant supplies, nearly quit when restaurants closed, and then moved upstream into resin and factories. A $17 million round and a World Cup-sized order have now tested whether compostable packaging can finally behave like the plastic it replaces.
The Company That Turns Cow Manure and Table Scraps Into Pipeline Gas
Founded in 2017, Sevana Bioenergy builds the tanks where dairy manure and rotting food break down into pipeline-grade fuel. Then it bought the biggest one in North America for pennies on the dollar.
Terraton
Terraton is a San Francisco climate-tech company that turns agricultural waste into biochar - a stable, carbon-rich material that locks away CO2 for centuries. It packages financing, hardware, and software into a 'biochar business in a box' so agribusinesses in emerging markets can launch carbon-removal facilities, while corporate buyers get verified, high-durability carbon credits delivered at scale. Backed by an $11.5M seed round co-led by Lowercarbon Capital and Gigascale Capital, Terraton already runs facilities in Ghana and Kenya.