Expert answer: This time will be longer, at least thirty to fifty years. The hydrogen bomb is to explode a small atomic bomb first, producing 100 million degrees of heat, and then to realize the Nuclear fusion explosion. Once the Nuclear fusion power station succeeds, it will be an artificial small sun. China is participating in the International Thermodynamic Nuclear fusion Experimental Reactor Project (ITER), which is an unprecedented cooperation of mankind. China also has a place in it. We in China have the ability to participate. Nuclear energy has been solved, and with sufficient energy, hydrogen can be obtained, as well as artificial liquid fuel - alcohol. But if there is only one Hydrogen fuel cell, it is one-sided. The future of cars should be about letting a hundred flowers bloom and showcasing their unique abilities! Ultimately, we need to speak with facts.

　　Another important concept is to use Life Cycle Theory to evaluate whether a product is environmentally friendly and energy-saving, from the beginning of product development to the entire process of application. The electricity used by electric vehicles in Shanghai is generated from coal, which causes pollution, including sulfur dioxide and dust. So Shanghai electric vehicles are not necessarily environmentally friendly. If the electricity of electric vehicles is generated by hydropower, it may be environmentally friendly. Some electric vehicles use lead-acid batteries, which also cause pollution. So we need to look at whether cars are environmentally friendly from the entire process, not just at one stage.

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