Yogurt may be a healthy dietary choice. But making it? Too often, not healthy for the planet. Dairy cattle account for about 8% of human-caused methane emissions, mainly through cow burps and manure. “We have a clear mission: to provide healthy food to as many people as possible,” says Nathalie Alquier, chief sustainability officer of Danone, the world’s largest yogurt maker. In line with that mission, Danone announced in 2023 it would reduce its methane emissions 30% by 2030—and nearly achieved that goal at the end of last year. The Paris-based company, which operates in more than 120 countries , drives sustainability in partnership with its more than 60,000 dairy-farmer suppliers around the world. For instance, Danone equipped 6,500 small dairy farmers with biodigesters that turn livestock waste into renewable biogas and organic fertilizer. “We believe in collective action because we know that, in this battle, the more who join the better,” Alquier says.…