Sucking up CO2

Founded: 2016

HQ: Somerville, MA

Carbon-negative microbial fertilizer.

Big Picture

Synthetic fertilizers enabled massive strides in agricultural productivity. Yet, production and over-application of these chemicals also account for 7% of global GHG emissions, largely in the form of N2O, which has 265x the warming potential of CO2. The challenge for alternatives is to achieve cost competitiveness while preserving the versatility of synthetic fertilizers in adapting to a range of soils and species. 

How it Works

Kula Bio engineers microbes that fix nitrogen directly from the air. A barrier for other enzyme-based fertilizers is identifying energy sources to keep microbes alive long enough to fix significant quantities of nitrogen. Kula supercharges microbes so that they store energy within their cells, giving their microbes a weeks-long energy source and allowing them to replace up to 100% of synthetic nitrogen.

Unfair Advantage

The result is a non-GMO biofertilizer that can fully replace synthetic nitrogen fertilizer across a broad range of crops, soils, and climates. Kula will be cost-competitive and more efficient than synthetic fertilizer, while also fixing carbon in the soil to net remove CO2. Kula costs a fraction of traditional fertilizers to produce and can be applied on-demand, rather than 9-12 months ahead.


Tons of CO2

removed per ton of fertilizer


Bill has decades of executive experience growing climate tech startups in chemicals and materials manufacturing.

Follow: @billbrady96


Dan is a Harvard professor of chemistry, widely-recognized as a pioneer of photochemistry and photophysics, and inventor of the “artificial leaf.”

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Harvard Gazette

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Harvard Magazine

Bill Brady, Co-Founder and CEO of Kula Bio

My Climate Journey Podcast