These two sisters have transformed a dream into reality. Melati and Isabel started their own company, Bye Bye Plastic Bags in 2013, at the ages of 10 and 12, respectively. They live in Bali, and were inspired after sitting through a lesson about Nelson Mandela, Lady Diana, and Mahatma Gandhi in school and decided to literally be the change they wanted to see in the world. Inspired by Rwanda, a small African country that banned polyethylene bags in 2008, the girls’ basic mission was to get the people of Bali to simply start saying no to plastic bags. They started with beach cleanups, graduated to petitions and government help, and their company has now grown to an organization with a 25-person staff and board of directors with teams in fifteen different countries working to make the world a place with less plastic with similar tactics and campaigns. But the most inspiring part of their work is that it’s achieved real results: they successfully lobbied Bali airport to ban plastic bags in August 2016, and by January of this year, the entire island of Bali was declared plastic bag free. The country of Indonesia, one of the most populous in the world, is planning to ban all plastic bags by 2021, and Melati and Isabel are directly to thank.