Does Necklace of Adaptation allow to breathe underwater?

@JeremyECrawford Does Necklace of Adaptation allow me to breathe underwater? The DMG says it allows me to breathe in ANY environment.

— André Segovia (@cav748) January 22, 2016

A necklace of adaptation does, indeed, work in any environment, including underwater or in a vat of snot. #DnD https://t.co/YD6Fweekyg

— Jeremy Crawford (@JeremyECrawford) January 23, 2016