Stockholm: Teen climate-change activist Greta Thunberg showed support for Democrat Joe Biden on Saturday, urging voters concerned about the environment to make their voices heard in the US presidential election.The Swedish 17-year-old said in a tweet that she never engages in party politics, but that “the upcoming US elections is above and beyond all that”.”From a climate perspective it’s very far from enough and many of you of course supported other candidates. But, I mean…you know…damn! Just get organised and get everyone to vote #Biden,” she wrote.Thunberg, who sparked a global climate protest movement after striking outside the Swedish parliament in 2018, could encourage participation among younger voters who are typically less likely to vote than older Americans.