每当我们提到CO_2,往往大家想到的是温室效应,给人们的印象是CO_2永远是一种反面性的物质。其实这是对CO_2的片面、不公正的认识。现代科学已经证实,CO_2在农业生产、制冷、人工降雨、灭火、制取甲醇、乙醇、工业清洗剂等各个方面对人类的贡献也是巨大的。下面我们就主要谈谈CO_2的正面效应及其新用途。1.用于贮藏食品用二氧化碳来贮藏食品,由于缺氧和二氧化碳的抑制作用,可以 Whenever we refer to CO_2, we often think of the greenhouse effect, giving people the impression that CO_2 is always a negative material. In fact, this is a one-sided, unfair understanding of CO_2. Modern science has confirmed that CO_2 contributes to humanity in various aspects such as agricultural production, refrigeration, artificial rainfall, fire extinguishing, preparation of methanol, ethanol, and industrial cleaning agents. Here we mainly talk about the positive effects of CO_2 and its new uses. 1. For the storage of food with carbon dioxide to store foods, due to the inhibition of oxygen and carbon dioxide, can