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Shenzhen protecting old trees with GPS

After losing 86 old trees over a period of six years, the forest authorities of Shenzhen in China has turned to the GPS to preserve the remaining old trees.

From last September, Shenzhen forestry authorities began defining positions of old trees using the system and, so far, the positions of more than 400 old trees had been determined by means of the positioning system, said Chen Lizhong, an official of the municipal forestry office. “These 400 trees are all within the boundaries of the special economic zone and we have yet to locate the old trees outside the special economic zone,” Chen said.