Check out this article from National Geographic about a young man making a HUGE difference for our planet! Felix Finkbeiner is a 19-year-old from Germany who started Plant-for-Planet, an environmental group, when he was only in the 4th grade!  His group has planted over 14 billion trees around the world and they have a goal of planting more than one trillion trees.  People like Felix show us that everyone, no matter their age, can help the planet.