核能在採礦,建造,製造燃料需要耗能。 火力也需要開採,建造、運送,而且把煤裡面的 C 直接釋放出來。 多C多健康?
https://www.eia.gov/energyexplained/index.php?page=nuclear_environment Nuclear power reactors do not produce direct carbon dioxide emissions Unlike fossil fuel-fired power plants, nuclear reactors do not produce air pollution or carbon dioxide while operating. However, the processes for mining and refining uranium ore and making reactor fuel all require large amounts of energy. Nuclear power plants also have large amounts of metal and concrete, which require large amounts of energy to manufacture. If fossil fuels are used for mining and refining uranium ore, or if fossil fuels are used when constructing the nuclear power plant, then the emissions from burning those fuels could be associated with the electricity that nuclear power plants generate.
"...many nuclear experts say that Gates's company is pursuing a flawed technology and that any new nuclear design is likely to come at a prohibitive economic cost and take decades to perfect, market and construct in any significant numbers...." "...Many nuclear power experts say that the technology Gates is promoting — called a “traveling wave reactor” — does not work as advertised, at least not yet. “These designs ... require advances in fuel and materials technology to meet performance objectives,” a Massachusetts Institute of Technology report said last year." "...TerraPower has discovered that the traveling wave didn’t travel so well and that it would not evenly burn the depleted uranium in the “candle.” Second, and partly as a result, it needed to change the design to reshuffle the fuel rods — and do that robotically while keeping the reactor running. Third, it has struggled to find a metal strong enough to protect the fuel rods from a bombardment of neutrons more intense than those commonly used in reactors — and for a much longer period of time." "...TerraPower also suffered a setback in October when the Energy Department effectively killed any chance of building a demonstration reactor in China. The department announced measures to prevent “China's illegal diversion” of U.S. civilian nuclear technology for military purposes."