You might want to change the world but feel powerless to do anything as a teenager. Monica Bourgeau wrote a good article that you can find on the Huffington Post website about 7 Ways to Change the World. The first one was to start small. She told the story of Nobel Prize Winner, Mohammad Yunus, who started a micro finance business lending money to those in poverty to start their own businesses. He started with $27 of his own money. Now the Grameen Bank which he started has issued billions of dollars to over 7 million borrowers.