While some benefits such as stress relief are backed by solid evidence, they can be achieved without expensive hyped-up coursesRead more in the Antiviral seriesIn the 2012 film adaptation of the Dr Seuss book The Lorax, a fable about capitalist greed, air is a commodity.The mayor of Thneedville deprives the city’s residents of trees so a company he heads can sells bottles of air. He has, as one advertising lackey puts it, “gotten rich selling people air that’s ‘fresher’ than the stinky stuff outside”.Donna Lu is an assistant editor, climate, environment and science at Guardian AustraliaAntiviral is a fortnightly column that interrogates the evidence behind the health headlines and factchecks popular wellness claims Continue reading...