In schools everywhere, children are asked what they want to be when they grow up, and people try to motivate them for future. For a long time, we have all been going through these processes, looking for answers to the question, “What do I want to do?” Last year, a child called Greta Thunberg decided what to do without waiting to grow up and took action. The reason that pushed her to take action was very simple. Climate change had turned into a climate crisis and the elders, who hold the power, were doing nothing. So, she had to do something to protect the environment. As she often said, she didn’t do it so willingly. Greta’s story is really inspiring and could change the world. We prepared this book in order to announce this story to all children and to make them share the same feeling about the future.