So-called “superfoods” may be packed with vitamins and nutrients, but they’re often anything but super when it comes to your carbon footprint. Many of the berries, seeds and dried fruits marketed as superfoods aren’t local and have to be shipped or flown in from thousands of kilometres away. This applies to the many consumers in Europe who eat chia seeds, avocados and goji berries – all foods likely to drive up your carbon footprint. But there are always local alternatives to superfoods – and not just for sustainability reasons. “Exporting exotic superfoods often makes them more expensive and …