Lewis Hamilton is at the top level of motor racing, one of the most polluting sports on earth. The F1 circus travels around the world belching out tonnes of carbon emissions into the atmosphere. The vegan diet he espouses because of his fears of climate change includes food flown from across the world, some of which is highly processed. The majority of land used in livestock farming is unsuitable for growing anything else, so perhaps the advice should be to eat more home-grown meat and seasonal, local fruit and vegetables.