Quote Originally Posted by Dodger View Post
It doesn't matter to me where the particles are coming from - as long as they don't get in my lungs.
On that subject, do you have any air filters in your residence ?

I sort of acquired one in the UK after an ex-tenant abandoned it. Now whilst the air quality here rarely needs it, when there is a problem, such as after the neighbour tried to burn something in the garden, it rapidly reduces the PM2.5 count in the house. As verified by a pocket PM2.5 meter I picked up in Bangkok.