When humans hurt nature, Earth weeps. Its screeching wails rise towards the sky and rain down teardrops, not of blood or salt, but acid. Dubbed “acid rain,” this rain is a witch’s brew that has ...

Just when you thought it was safe to go out in wet weather, acid rain "may have a sequel", said Popular Mechanics, and "like most sequels, it's arguably worse". And it might not have a happy ending ...

Sugar-loving mouth bacteria create acids that damage teeth, but arginine can help fight back. In a clinical trial, arginine-treated dental plaque stayed less acidic, became structurally less harmful, ...