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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R+G7leG7nS/DlOG7o+G7ncOUc+G6ruG7hOG7seG7mOG7mMOzcsOUJkjhurDhu6Ry4bujMEh24buUc+G6tkxHRXPhu5TDieG6skhz4bqw4buI4bq4c0ZB4bukc+G6ruG7ouG7sXNVQnPhu5ThurhHw4lz4bq54bqy4buS4buS4buxc+G7mOG6pnPhu4LhurRIc+G6sOG7r+G6uHPhu5TDk+G6uHPhuq7hu5ZK4bq4c+G7lMOJ4bqgw5Rz4buC4buoc0fhu6/hu6Thu5Vzw6HDicOSc+G6sFRz4buE4bq4QuG7lnNG4buvc0dJc+G7lMOJ4buWc+G7lMOJ4bqgw5Rz4buU4buSSEdFc+G7lOG7oE9HRXPhu4Thu7Hhurjhu5lz4bqu4but4bquc0fDieG7r3Phu4LDiUjhu7Fzw4nDjOG6rnPhu5jhuqZzxILhurjhuqjhu5RzRkHhu6RzxILhu7Hhu6RzRcOAR3NG4bu14buUc+G6tsOB4buUc8OJT0dz4buE4buvc8OZ4buWc8OJ4bugw5NHRXPhu4RB4buWc+G6sOG7r+G6uHPDieG7seG7pHPhuq7DieG6vnPhu4Thu69zw4nhurhCR3Phu5Thu6Dhu4xHRXPhurDhurhER3Phu5Lhu7Fz4buU4buSSEdFc+G7gsOJSHdHRXPhu5TDicOS4bq4c0Xhurjhu7FHc0dFw71H4buV4budL8OU4buj4budw5Rz4bqu4buE4bux4buY4buYw7Nyw5QmSOG6sOG7pHLhu6PhurnDieG6skhzOeG6uFXhurLhu5jhuq7hurjhurJH4bqu4bqy4buZc8Otw6Es4budL8OU4buj