線上雙語知識平台

世界迫切需要一種安全、無碳、無污染和無限制的能源來提供電力，而核能有可能是其中一種可能性。

化石燃料是目前主要能源來源之一，但近年因氣候變遷和減碳節能的趨向，全球正轉向發展可再生能源。可再生能源包括太陽能、風能、水力能、地熱能、潮汐能等，但不包括現時的核能。

雖然核能能夠減少碳排放又成本低廉，但給人的印象是危險、污染性大。目前在世界上的核能是通過核分裂來發電的，這不但會產生大量的放射性廢料，亦有面臨泄漏或爆炸的風險。這種核分裂式的核能不算是可再生能源，因鈾礦儲藏量也是有限的。

科學家正改善核能技術，其中一個研究方向是核聚變。透過核聚變，人類能使用少量的燃料，產生極少的核廢料，從相對較小的機器中產生巨大的能量。這些特點再加上高密度的能量輸出將使它們成為大城市的理想能源。

[Sustainable Development Goal 7: Affordable and Clean Energy]

The world urgently needs a safe, carbon-free, clean and limitless source of energy to provide electricity. Nuclear energy could be one of the possibilities.

Fossil fuels are currently one of the main sources of energy, but in recent years there has been a global shift towards renewable energy due to climate change and the trend towards carbon reduction and energy conservation. Renewable energy sources include solar, wind, hydro, geothermal and tidal energy, but not the current nuclear energy.

Although nuclear energy can reduce carbon emissions and is inexpensive, it gives the impression that it is dangerous and polluting. Currently, nuclear energy is used to generate electricity through nuclear fission, which not only generates a large amount of radioactive waste, but also poses the risk of leakage or explosion. This type of nuclear energy is not considered a renewable energy source, as uranium stocks are also limited.

Scientists are improving the technology of nuclear energy and one of the directions of research is nuclear fusion. Through nuclear fusion, mankind can use a small amount of fuel to generate a considerable amount of energy from a relatively smaller installation, without producing significant nuclear waste. These features, combined with the high level of energy output, will make them an ideal source of energy for modern metropolis.