Why agriculture is a tough climate problem to solve

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It’s a real problem, from a climate perspective at least, that burgers taste good, and so do chicken sandwiches and cheese and just about anything that has butter in it. It can be hard to persuade people to change their eating habits, especially since food is tied up in our social lives and our cultures. 

We could all stand to make some choices that could reduce the emissions associated with the food on our plates. But the longer I write about agriculture and climate, the more I think we’re also going to need to innovate around people’s love for burgers—and fix our food system not just in the kitchen, but on the farm. 

If we lump in everything it takes to get food grown, processed, and transported to us, agriculture accounts for between 20% and 35% of annual global greenhouse-gas emissions. (The range is huge because estimates can vary in what they include and how they account for things like land use, the impact of which is tricky to measure.) 

So when it came time to put together our list of 15 Climate Tech Companies to Watch, which we released earlier this month, we knew we wanted to represent the massive challenge that is our food system. 

We ended up choosing two companies in agriculture for this year’s list, Pivot Bio and Rumin8. My colleague James Temple and I spoke with leaders from both these businesses at our recent Roundtables online event, and it was fascinating to hear from them about the problems they’re trying to solve and how they’re doing it. 

Pivot Bio is using microbes to help disrupt the fertilizer industry. Today, applying nitrogen-based fertilizers to fields is basically like putting gas into a leaky gas tank, as Pivot cofounder Karsten Temme put it at the event. 

Plants rely on nitrogen to grow, but they fail to take up a lot of the nitrogen in fertilizers applied in the field. Since fertilizer requires a ton of energy to produce and can wind up emitting powerful greenhouse gases if plants don’t use it, that’s a real problem.

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