no
You could use an air purifier with a HEPA filter to remove dust particles from the air, making it safe to breathe. Additionally, regularly cleaning and dusting the room, using an air humidifier to trap dust particles, and ensuring good ventilation can help improve air quality.
In high concentrations - no. In low concentrations it's pretty much like any other dust.
Yes, when you inhale their air comes with microbes, pollen, and dust.
There's an "asteroid belt", but there's no such a thing as a "meteor belt". A "meteor" is what we see when a "meteoroid" is heated up as it enters Earth's atmosphere. Meteors are mainly caused by "dust" from comets. There isn't really a "meteoroid belt" either. However, some meteoroids originate from the asteroid belt.
Yes, when you inhale their air comes with microbes, pollen, and dust.
Dust?
"DE" is short for diatomaceous earth. noun: a soft, crumbly, porous sedimentary deposit formed from the fossil remains of diatoms. As a filter media, yes it is safe and very effective. It is NOT SAFE to breathe the dust.
No, methane is not safe to breathe as it can displace oxygen in the air, leading to suffocation.
Yes. You breathe in dust, pollen and sometimes you get allergies from them but you can definitely smell them.
There isn't a Dust Mate belt with the number EB20110. I think you meant EB21010, which does exist and is used in several of the Dust Mate models. If you need this belt you can find it at http://www.vacbelts.com/eb21010-belt.htm
No! It is a poison.
No, liquid nitrogen is not safe to breathe as it can cause serious harm to the respiratory system and can be fatal if inhaled.