Miers agrees that carbon labels only tell us a fraction of the story, but says it"s a useful tool that gets people to start thinking about food"s climate impact. "But if we just focus on carbon, we are really at risk of oversimplifying a complex subject which is nature and shooting ourselves in the foot," she says, adding that Wahaca is also focusing on other environmental issues beyond greenhouse gas emissions, including sourcing ingredients from regenerative farmers who do not use any herbicides or fertilisers to boost soil health (which further enables it to trap more carbon).