@taipan168 @OXHarryH1 @tax_oz @michaelmina_lab @mbrushstocks The costs are negligible, and there are clear benefits to cleaner air regardless. If they might work, and both mechanistic and observational studies are enough to say they probably do, that's good enough.
@taipan168 @OXHarryH1 @tax_oz @michaelmina_lab @mbrushstocks 成本可以忽略不计，无论如何清洁空气都有明显的好处。如果它们可能起作用，并且机械和观察研究都足以说明它们可能起作用，那就足够了。