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).
Fall begins Sept. 23. In the northern hemisphere, the season of fall begins with the autumnal equinox, which falls on Wednesday, Sept. 23, 2015. The equinox is defined as when day and night are the same length, approximately 12 hours each. Fall, also known as autumn, is one of four seasons during the year, occupying the space between summer and winter. In the southern hemisphere, fall occurs during the months of March, April and May.