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closed and the nomads moved. I think climate change and mining have had a bigger impact."Assessing the programme is complicated by political tensions. In the past year, three prominent Tibetan environmental campaigners have been arrested after exposing corruption and flaws in wildlife conservation on the plateau.InfestationAnother activist [link widoczny dla zalogowanych], who declined to give his name, said it was difficult to comment. "The situation is complicated. Some areas of grassland are getting better. Others are worse. There are so many factors involved."A growing population of pika [link widoczny dla zalogowanych], gerbils [link widoczny dla zalogowanych], mice and other rodents is also blamed for degradation of the land because they burrow into the soil and eat grass roots.Zoologists say this highlights how ecosystems can quickly move out of balance. Rodent numbers have increased dramatically in 10 years because their natural predators – hawks, eagles and leopards – have been hunted close to extinction. Belatedly, the authorities are trying to protect wildlife and attract birds of prey by erecting steel vantage points to replace felled trees.There is widespread agreement that this climatically important region needs more study."People have not paid enough attention to the Tibetan plateau. They call it the Third Polyilai:
[link widoczny dla zalogowanych]

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