Our friend and co-trustee Warren Buffett once gave us some great advice about philanthropy: “Don’t just go for safe projects,” he said. “Take on the really tough problems". We couldn’t agree more. Our foundation is teaming up with partners around the world to take on some tough challenges: extreme poverty and poor health in developing countries, and the failures of America’s education system. For each issue we work on, we fund innovative ideas that could help remove these barriers: new techniques to help farmers in developing countries grow more food and earn more money; new tools to prevent and treat deadly diseases; new methods to help students and teachers in the classroom.