British singer Joss Stone is advising all her fans to get gardening - and save the planet from global warming. The You Had Me hitmaker performed at Johannesburg's Live Earth event earlier this month (07Jul07) to raise awareness about climate change. And Stone, 20, is continuing the crusade on her website with a stark warning. She writes, "We are the ones killing the earth - every single one of us. "We don't have to completely change how we live, we just have to be more thoughtful. Hey, if you've got a couple of minutes go plant a tree."