This startup makes rich, creamy butter out of CO2

Savor, a Bay Area-based startup backed by Bill Gates, makes ingredients without animals, farmland, or fertilizer.

The best plant-based burgers still aren’t exactly like beef, even if they’re getting close. The challenge is fat: It’s hard to make plant-based fats sizzle like beef fat on the grill or melt in your mouth in the quite the same way. Animal fat also gives dairy products like butter or ice cream their own unique richness.