Alongside the development of industries, climate change makes the earth less ideal to live on. Some people, therefore, suggest investing more in the field of astronomy to find alternative planets. This may be true, but I believe this is not the only way to save our future. On the one hand, finding other planets to live on is a good idea. Firstly, many limited natural resources are many limited natural resources that are over-exploited nowadays. Once these resources are no longer available, we will have been lacking fossil fuels, such as charcoal or petroleum. Industrial and daily activities are considerably dependent on them, so it is necessary to start to find new planets that have these resources to exploit or even live in. Secondly, setting a goal of settling down on a new planet can force astronomy to grow faster. Becoming learned in the field, the scientists will figure out new places to live and other innovations, exploit the energy of the stars, and communicate w...