With the increasing awareness of environmental protection, various environmental protection products and alternative energy sources have been inexhaustible.

I. Revolving door power generation

There is a revolving door at the entrance of every hotel, and people have to turn it when they go in and out. So why not convert the kinetic energy of driving the revolving door into electric energy and store it? It can be used as an energy source for night lighting, and it can also be used to guard against unexpected needs. Those restaurants with booming business can save 70-80 yuan on electricity bills every month, and small restaurants can also buy more rice, oil, salt, sauce, vinegar and tea. It is not illegal to spend money for nothing, and it also protects the environment. Why not?

I think this kind of generator should be popularized and installed in every hotel, not only for the hotel itself, but also for our beautiful earth. Because this kind of generator does not emit carbon dioxide, it will not consume a lot of materials in the construction, but will only save tens of millions of kilowatt hours for the whole country and add green to our beautiful earth.

Second, sewer power generation.

Every building will have a long sewer. What can be done on this common and ordinary thing? I said: Let's generate electricity. The idea comes from the huge power generation of the Three Gorges Dam. Hydroelectric power generation is to use water with potential energy from high places such as rivers and lakes to go to low places, and convert the potential energy contained in it into kinetic energy of hydraulic turbines, and then use the hydraulic turbines as power to drive generators to generate electricity. The turbine is driven by water power to rotate, and the water energy is converted into mechanical energy. The generator is connected to the turbine, which can generate electricity with the rotation of the turbine, and then the mechanical energy is converted into electrical energy. The sewer has one advantage, that is, it is deep and the pressure at the bottom is high, which is easy to drive the turbine to rotate and avoid the hidden danger of blockage. Often use water, it is conceivable that not only the electricity fee for corridor lights is exempted, but also the elevator fee is almost gone. Moreover, hydropower is a renewable energy source, which is inexhaustible and clean, and has no harm to the environment. We can install it in every household.

If these two kinds of generators are popularized, it will save millions of kilowatt hours of electricity, avoid tens of thousands of blackouts, reduce the burning of tens of thousands of tons of coal and reduce the emission of thousands of tons of carbon dioxide, so that the burden on the earth will be greatly reduced and our future will be full of green.