The people of Cateura, Paraguay, have a garbage problem. They live alongside the country’s largest landfill, where 3 million pounds of waste are sent every day. But young musicians there are raising awareness about recycling in a creative way: by playing instruments made from actual trash, including cans, pipes, cooking utensils, and oil drums. Meet the Recycled Orchestra, which plays everything from Mozart to Frank Sinatra to Paraguayan folk music. They’ve performed all over the world and backed famous artists such as Stevie Wonder and Metallica. But perhaps the most important thing they’ve done is change their own community, says founder Favio Chávez. Before, he notes, parents used to pull kids out of class to work. Now, music and education are more respected. And of course, the orchestra is also making a difference by encouraging others to take better care of the planet. “On every stage we perform, we say, ‘You send us garbage, we send back music,’” Chávez told the BBC. “This way, people realize garbage is not only a problem but an alternative.”