can you write the answer clearly to understand it thanks What are PMIo and PM2s stand for, which one is more dangerous and in what unit we measure them? Solution PM represents particulate matter, which act as a parameter to represent/ measure air pollution level. PM 10 means particulate matter of size equal to or less than 10micrometer and PM 2.5 means particulate matter of size less than or equal to 2.5micrometer. (1 micrometer = 1 x 10 -6 meter).  PM 10 and PM 2.5 are mesured in parts per million (ppm). Owing to the very small size relative to PM 10 , the former can pass through the respiratory tract to the lungs and other part of the body rather easily than the latter and found to be more fatal. .

1. can you write the answer clearly to understand it
thanks
What are PMIo and PM2s stand for, which one is more dangerous and in what unit we measure
them?
Solution
PM represents particulate matter, which act as a parameter to represent/ measure air pollution
level. PM 10 means particulate matter of size equal to or less than 10micrometer and PM 2.5 means
particulate matter of size less than or equal to 2.5micrometer. (1 micrometer = 1 x 10 -6
meter).  PM 10 and PM 2.5 are mesured in parts per million (ppm). Owing to the very small
size relative to PM 10 , the former can pass through the respiratory tract to the lungs and other
part of the body rather easily than the latter and found to be more fatal.