The stamps go on sale from PostNord on ThursdayStockholm: Climate activist Greta Thunberg is to feature on a set of stamps issued by Sweden's postal service.She will join a hall of fame of Swedish personalities, from Zlatan Ibrahimovic to Greta Garbo, who have been depicted on the country's postage stamps.The stamps go on sale from PostNord on Thursday and show Thunberg in her familiar yellow raincoat standing on a rocky coast looking out at a flock of birds."We hope that, as a big company, we can shine a light on the very important climate question, with the help of a little stamp," said Kristina Olofsdotter, head of PostNord's stamp division.Several million of the stamps will be issued, Olofsdotter said, adding: "There will be a lot of Gretas flying around."Thunberg rose to global fam...