The worry is that the other two approaches may prove similarly futile-diverting attention and effort from more promising avenues or, worse, causing actual harm.

令人担忧的是，另外两种方法可能被证明一样是徒劳——将注意力和精力从更有希望的途径上转移，或者更糟，造成实际的伤害。

However, I am deeply sceptical about narratives that exclusively centre speculative rather than actual harm, and the ways these narratives occupy such an outsized place in our public imagination.

然而，我对那些完全以推测而非实际伤害为中心的叙述深表怀疑，以及这些叙述在我们公众想象中占据如此重要地位的方式。

I think we're better with humans through epidemiology, but for a lot of wildlife, there are big question marks about the actual harms that may be occurring because of exposure.

我认为通过流行病学我们对人类更好，但对于很多野生动物来说， 由于接触可能发生的实际危害存在很大的问号。

In the first place, as more and more cars are produced and run in the street, a large volume of poisonous gas will be given off, polluting the atmosphere and causing actual harm to the health of people.

首先，随着越来越多的汽车生产和行驶在大街上，会释放出大量有毒气体，污染大气，对人们的身体健康造成实际危害。