Taking a long, deep breath is good for both our bodies and minds. It supplies necessary oxygen to our blood and can help to create emotional calm. However, calm and oxygen are not the only things a deep breath brings. In many parts of the world, a deep breath also brings pollutants into our bodies. For many people around the world, breathing polluted air has become the new normal. On its website, The World Health Organization warns that 91% percent of the world’s population lives in places where air quality exceeds WHO guideline limits. On its website, WHO experts say that air pollution kills an estimated 7 million people worldwide every year.