These then react with the ozone molecules, resulting in their removal. CFCs have a lifetime in the atmosphere of about 20 to 100 years, and consequently one free chlorine atom from a CFC molecule can do a lot of damage, destroying ozone molecules for a long time.
exists and is an alternate of . In the northern hemisphere of Earth, Fall begins on the Autumnal equinox (22-23 September) (in Persian calender it will begin at the first day of Mehr) and ends on the Winter solstice (21-22 December). In the southern hemisphere of Earth, Fall begins on the Autumnal equinox (20-21 March) and ends on the Winter solstice (20-21 June).
the time when fall starts is between summer and winter as with the other seasons its commencement differs and is based on the hemisphere you are in commencement dates in astronomical terms the season begins on september 22 up to november 22 in the northern hemisphereuring olden times the season was just referred to as harvest time the word autumn was derived from a latin word and was first used in the 12th century however it did not gain wide usage until the 16th century by that time the word fall and autumn came into use