Does what we put into our plumbing end up back in the water supply?
Credit: Pixabay/CC0 Public Domain When you see an advertisement for a detergent promising to brighten your clothes, something called a fluorescent whitening compound, or optical brightener, is probably involved. Such material absorbs UV light and emits visible blue light via fluorescence. The result? Brighter whites, vibrant colors. Yes, your clothes are glowing. As it turns…
