What is the ruling on electronic cigarettes, for which no harms have been mentioned so far, except for the World Health Organization's fear of addiction or their use by non-smokers, bearing in mind that their sale generates money?

"E-cigarettes" appeared in China in 2004. They resemble regular cigarettes and contain a rechargeable battery and a nicotine liquid capsule. Many countries, including the Arabian Gulf, have banned their import, despite continuing to permit regular cigarettes. The nicotine they contain makes their religious ruling the same as that of regular cigarettes, which Sharia prohibits. Therefore, it is impermissible to buy or sell them, for the Prophet, peace and blessings be upon him, said: "Indeed, when Allah forbids something, He forbids its price."