About of men of european descent experience substantial hair loss by age 40.

Hair loss is a common issue which involves many factors like stress, taking drugs and hormone imbalance etc. For men a hormone called dihydrotestosterone (DHT) can be responsible. It can be genetic but other factors affect the time and intensity of the loss in various generations. 

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't

you would times this by how many days there are in a year 365*400=$146000