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).
What is the Fall/Autumn Season? Start & End of Fall/Autumn 2017 â Also known as autumn, fall is the season that follows summer and precedes winter. In the United States, there is a term called âautumnal equinoxâ, which simply means that the daytime and nighttime hours are the same. This occurs every 23rd of September, following shorter day time.