Trời đang xuống gần đất hơn
Cập nhật: 08:28 25/02/2012 GMT+7
Một nghiên cứu cho thấy độ cao của những đám mây trên địa cầu đang giảm dần trong những năm qua.
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ssOAROG7kcO94buC4bqy4buR4bqq4bq24bq04buR4bq24butTGvhu5HDneG7huG7kXhwxJDhu5F4w5Nw4buRQ+G7qcag4buReHJE4bqw4buR4bqw4bqydEPhu5FL4bq2w4Lhu5FLxKhx4bqy4buRw73hu6tL4buRSkHhu5FE4bqwTOG7huG6suG7kUThurZwROG6tuG7keG6tkZEa28v4buKw7Nv4buK4buReEJwSkpnw7Thu4pXxJB5xqDDtMOzO8SQc0vhu5HDveG7hkThurDhu5FL4bq24buzxJDhu5F54bq84bqy4buRQ+G7qcag4buReMOTcOG7keG7mOG6ouG7kUvhurJE4bq24buR4bqz4buzxKjEqHDhu5FKQeG7keG6quG7tcSQ4buReXLhurLhu5FLR+G6suG7kXhM4bq+4bqy4buRS+G6tuG7reG7iuG7keG6quG7nuG7kURyxqBr4buRXeG6tkjhu5F54buS4buRQuG6suG6okzhu5FDcuG7kURF4buRS+G6tkzhu5FL4bq24but4buK4buRS8SoxJBE4bqw4buRS+G7jEZE4bqw4buRQnDhurJq4buReHF44buRROG6tnLhu5HhuqrhurbEkHDhu5Hhurbhurh44buRSkHhu5F34bqyw4BL4buRQ+G7qcag4buRd3DGoOG7keG6sOG7sUThu5FD4bunS+G7kcO94burS+G7keG6tkZE4buRQnLhu5Hhu5ZM4buR4bq24buMR0ThurDhu5FC4bupTOG7kXly4bqy4buR4bq2cMag4buReOG6tuG6puG7kUJy4buR4bq24bqy4bqiROG7kUvhu4xJROG6sOG7kXnhurLEgkThu5HEqHDhu5FLxKjEkEThurDhu5HhuqrhurbEkHRE4bqw4buRS+G6tkjhurLhu5HhurDhurJwROG7kUThurDDuURrby/hu4rDs2/hu4rhu5F4QnBKSmfDtOG7ilfEkHnGoMO0w7PhurPhurbhu7PEkOG7kX3hurLhu5jhu7NKeOG6suG7s0R44buzauG7kcOpXeG7sm8v4buKw7M=