The earth as we know it, is always evolving, so every minimal act that we perform for it, can make a change. To create a story about a hero, I would use a park as the setting. I would catalog as a villain, anyone who throws garbage, as it directly affects our ecosystem and contributes to the destruction of the planet. A hero in this case, would be that person who is inclined to pick up garbage, or who performs the proper recycling of these. Directly, it contributes a grain of sand to protect our planet, and indirectly saving the lives of us all. The main value found here is education, so important to substise and lead a harmonious life.