Physics is one of the most elementary sciences there is. It may seem difficult at first, but we must give it a chance. With this subject we can learn how the universe works, particles, atoms or the different physical states of matter. You can also study the complex systems of the human brain or living organisms. Physicists can work in different fields of science, as they have a broad knowledge of the different areas. Everything around us is physics. Therefore, we must study physics in order to understand natural phenomena. To know why and where thunder is born, what the law of gravitation is, why the speed of light is faster than the speed of sound or why the earth rotates around its axis. Thanks to the discoveries of scientists and physicists, mankind has evolved. Great geographical discoveries have been made thanks to the work of physicists. Thanks to physics, other fields of science have been able to improve their studies and their results. In view of scientific progress, new projects and new research are continually being created, so studying physics is a safe bet for the future. Thanks to this branch of science we can improve the climatic and ecological situation of our planet thanks to innovations. If you study physics, you will be able to learn more about and contribute to improving the environmental situation, by investing in renewable energies and preventing the depletion of natural resources. In addition to all this, it is possible to undertake your own research. You can contribute to the discovery of something that will improve the current situation of planet earth and humanity. Alternative and renewable energies are a good field to continue researching and developing new projects that will help us to improve the conditions of the Earth.