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When cold air reaches a certain intensity, it can cause disasters such as low temperature, frost, and freezing in Guangdong, which has a great impact on crops, transportation and people's health. However, in addition to the harm, cold air also has many benefits: large amounts of cold air pour into the tropics, exchanging heat on a large scale with ground heat, contributing to ecological balance. It brings precipitation, alleviates drought conditions, and benefits crops. Bring low temperature weather and become a natural "insecticide",...