At the moment they do not know the long-term consequences of this pollution on the make-up of Earth's atmosphere, but it is unlikely to be good.
В России ответили на имитирующие высадку на Украине учения НАТО18:04
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What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:
Что думаешь? Оцени!