According to WHO air pollution has become one of the primary health concerns of the 21st century. Air pollution kills an estimated seven million people worldwide every year. WHO data shows that 9 out of 10 people breathe air containing high levels of pollutants. The epidemic of air pollution outdoors is very well documented in the news particularly in countries like China and India where the air pollution causes an estimated 4.2 million deaths a year.

Of course, we must highlight the recent tragedy that took place in Australia and the dramatic affects the fires had on the air quality with many people having to wear gas masks to get to work, tennis players retiring at the Australian open due to poor air quality, and an increased risk of hospitalization due to respiratory diseases.