A company best known for sucking up industrial waste gases is turning its attention to food. 

LanzaTech, a rising star in the fuel and chemical industries, is joining a growing group of businesses producing microbe-based food as an alternative to plant and animal products, as reported by MIT Tech Review.

Using microbes to make food is hardly new—beer, yogurt, cheese, and tempeh all rely on microbes to transform raw ingredients into beloved dishes. But some companies are hoping to create a new category of food, one that relies on microbes themselves as a primary ingredient in our meals.

The global food system is responsible for roughly 25% to 35% of all human-caused greenhouse gas emissions today (depending on how you tally them up), and much of that comes from animal agriculture. Alternative food sources could help feed the world while cutting climate pollution.

As climate change pushes weather conditions to new extremes, it’s going to be harder to grow food, says LanzaTech CEO Jennifer Holmgren. The company’s current specialty, sucking up waste gases and transforming them into ethanol, is mostly used today in places like steel mills and landfills.