Tại sao tuyết bẩn lại tan trước?
Việc tuyết tan nhanh hay chậm là do khả năng hấp thụ nhiệt mặt trời nhiều hay ít. Tuyết bẩn, do đặc tính không tinh khiết, nên dễ hấp thụ ánh sáng và nhiệt mặt trời hơn tuyết sạch, vì thế dễ tan hơn.
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