So how many stars are there in the Universe? It is easy to ask this question, but difficult for scientists to give a fair answer! Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way.
Reverse osmosis. Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
According to Kaz, Inc. (the manufacturer of the PUR brand) and NSF, the standard replacement filter (Part# CRF-950Z) for the PUR family of Brita pitcher style water filters is certified by NSF to reduce 6 contaminants to safe levels.