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 Action 7: Growing your own food. One way of reducing the carbon footprint of what we eat is to grow our own food. A daily salad of 50g of lettuce eaten over the course of a year will create 10kg of carbon dioxide if UK grown, or 20kg if imported from Europe. Salads like cress, rocket and mustard are easy to grow at home on a window sill or in the garden. For extra colour grow nasturtiums – both leave and flowers are edible as are the seeds which can be pickled like capers.