用了几十年的水银体温计为啥要禁产？

Core Viewpoint - The article discusses the impending ban on mercury thermometers in China by 2026 due to health and environmental concerns associated with mercury exposure [3]. Group 1: Health Risks - Mercury thermometers contain approximately 1 gram of mercury, which can evaporate and increase indoor mercury concentration if broken, posing serious health risks, especially to sensitive populations like children and pregnant women [3]. - Mercury vapor can penetrate the blood-brain barrier, potentially causing irreversible damage such as developmental delays and fetal deformities [3]. Group 2: Environmental Impact - Mercury is a heavy metal that does not naturally degrade; once it enters soil or water, it can be converted into more toxic methylmercury, which accumulates in the food chain and ultimately returns to humans [3]. Group 3: Alternatives - The article highlights that alternative products have surpassed mercury thermometers in safety and convenience, including soft-tip electronic thermometers, ear thermometers, and gallium-indium-tin alloy thermometers, which replicate the feel of mercury thermometers without the associated toxicity [3][4].