Just a moment, imagine stepping outside in the rain and thinking about the chemistry in every drop that reaches the ground. Most of us just think about rain as water, maybe laced with a little dust or pollution from the city. There are places around the planet, however, where rain can do more than simply carry water vapor and common impurities in the air down to Earth, and that includes chlorine-based compounds. One might refer to this type of rain as chlorine rain.
