Traditional Culture Encyclopedia - Traditional festivals - What is an inexhaustible source of energy on Earth?

What is an inexhaustible source of energy on Earth?

In general, water energy, solar energy and wind energy

Coal, oil, natural gas belongs to the fossil energy, fossil energy is a limited resource; nuclear energy belongs to the new energy, the fuel used is the nuclear fuel, is also limited; will produce nuclear waste and radioactive substances, improper use will produce environmental pollution; bio-energy belongs to the new energy, bio-resources is a renewable resource, but it is also limited; water energy, Solar and wind energy is not polluting the environment and inexhaustible energy