Air filters improve air pollution caused by industry

We long for fresh air without any pollution. We enjoy the gift of nature and take a deep breath. However, industrial pollution has brought air pollution, a large amount of PM2.5 and other pollutants such as formaldehyde, toluene, sulfur dioxide, nitrogen dioxide in the air. It seriously affects human breathing and brings disease and pain.
Maybe we can’t immediately improve air pollution across the planet, but we can improve air pollution in our own homes.