Question

What is the pH acid rain?

Answer 1

Occasional readings of acid rain have revealed a `pH` as low as `2.4`.

Explanation:

[See this site.](https://en.wikipedia.org/wiki/Acid_rain) Now I enjoy walking in the rain, but rain with such `pH` would actually burn you. The culprits? Of course they are nitrogen and sulfur oxides whose atmospheric chemistry gives nitrous, nitric, sulfurous, and sulfuric acid.