In 2050, humans will develop a new generation of environmentally friendly residential buildings. The houses under the trees are energy-saving houses, full of new energy applications. The waste materials generated in our lives are absorbed and transformed by the trees, which can provide sufficient energy for the houses at night. Man and nature coexist closely, and water resources are gradually purified. We expect various new energy sources to be used in our lives, and we also expect people to consciously protect the environment and save energy.