The world is the universe, which includes everything that exists: planets, stars, galaxies, as well as all forms of life that we know. Our planet Earth is only a small part of this vast world, but it is home to countless living beings. Humanity is part of this world, and we must take care of it in order to preserve it for future generations. We can do this: Using nature's resources carefully. Protecting the environment from pollution. Protecting endangered species. Fighting poverty and h...