Among the 50 countries in the study, VN, TQ and Spain had the fastest forest recovery speed in the world, while Nigeria and Philippines are the two countries the forest being "disappeared". The study also found that forest cover continues to decrease sharply and quickly in Indonesia and Brazil, while falling in the us and China.The Group of authors of the research said the tree-planting policy cause increase of forest, an area of agricultural land (based on intensive measures) and the wave of migration from the countryside to the city are factors contributing to increase investment capital for the forest during the last 15 years in 22 countries in total 50 countries with large forest area.
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