Human behaviour, however, is having a detrimental impact on animal migration.

然而，人类行为正在对动物迁徙产生不利的影响。

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The challenge is how to ensure food without increasing animal numbers and having an impact on fragile lands and our resource bases.

如何在不增加动物数量、不影响脆弱的土地和我们的资源基础的情况下确保食物供应，这是一项挑战。

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This new model allows us to refine predictions of the future impact of warming on plant and animal life across much of the world.

这种新的模式使我们能够完善对未来气候变暖对世界大部分地区植物和动物生活影响的预测。

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But a member of Parliament who represents Manitoba said removing the beaver would ignore the animal's impact on Canada's history.

BBC: Canadian senator wants polar bear as new emblem

"However, there are a range of factors we need to consider in making a decision on badger control, including public opinion, scientific evidence, animal health and the impact on farming communities, " he said.

BBC: UK public opposed to badger cull, opinion poll suggests

Nonetheless, SAFE has had a significant impact to improve animal protection across New Zealand.

FORBES: Don Binney (1940-2012): Tribute to A Great Artist and Conservationist