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 Sports. The Fall athletic season begins in mid-August with summer practices and ends in early November, depending on how far the teams advance in the playoff games. Students are welcome to join the a team after school begins, but must realize that larger sports make roster cuts. Joining in the summer ensures prospective athletes a timely tryout period. Summer training is also valuable for both physical conditioning and team building.