When did people first know about the phenomenon now known as “acid rain”? Think of a date. Odds are, you’re off by at least a century.
The water on your bedside table hasn’t had anything bad happen to it while you slept, but in the morning it tastes stale. Why? And how long can water stay out before it’s too bad to drink?
So what if aliens bleed acid? We breathe acid, suckers! And we can prove it! And while we're doing that, we can show why soda is very mildly bad for you.
We grow up hearing about acid rain, but what about other forms of acidic precipitation — do they even exist?
In the 1970s, acid rain caused by sulfur emissions killed trees and even dissolved statues. But the US Clean Air Act dialed back the deadly rainfall. Until now. Why has the rain gone acidic again?