Acid fruits like pineapples and lemons are sour

Acid rain in drinking water affects human health

The outside walls of the auditorium are terribly stained. It is, in part, due to acid rain

The auditorium is terribly stained. It is, in part, due to acid rain

I read an article about acid rain yesterday

The decay of the shrine is due, in part, to acid rain

Since primary school we've been checking for the qualities known as acidity and alkalinity with litmus paper

When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it

Acid soil is neutralised by ash

The fish are dying, the Canadians say, because of what's known as acid rain