[*Beat progresses*]

"Rain that has higher levels of acid than usual. This is because there are extra levels of hydrogen ions in the rain."

[*beat quiets*]

"So why and exactly how do we get acid rain? Acid rain occurs due to reactions in the air above us. The reactions come from two different places- volcanoes and factories. Since the Industrial Revolution, acid rain has happened on and off."

[*beat normalizes*]

It refers to rain that has a lower pH than 7, and is more acidic