The roof is rented to participate in the development of green energy. Instead of letting the roof be idle and exposed to the sun and rain, it is better to rent a roof to build solar panels. In addition to regular rent collection, the solar panels on the roof also have the effect of shading and heat insulation, thereby saving air and electricity bills. Solar power generation has no noise, and it does not generate electromagnetic waves that harm the human body. What's more, people do not have to worry about the cost of construction and subsequent maintenance。