What is Bi-Polar Ionization?

https://youtu.be/WcC-M-ATaMQ?t=201 Have you ever said, “I’m going outside to get some fresh air”? as if the air inside was not

Can You Reduce Risks of Coronavirus & Viral Infections by Improving Indoor Air Quality?

“Influenza and other respiratory diseases can spread efficiently in winter not necessarily because of the temperature but because human beings