有人能确定这种下降到底是由捕猎还是气候变化引起的吗?

Can anyone be sure if the decline is really caused by the hunting or by climate change?

youdao

人们大多认为气候变化是由矿石燃料燃烧的副产品所引起的。

Most people see climate change as an incidental side-effect when caused by burning fossil fuels.

youdao

这些都是由气候变化引起的。

This is all on account of climate change.

youdao