This year, the ozone hole's annual maximum set a record -- the smallest it's been since 1988. The hole in the ozone layer is caused each year as ozone molecules react with chlorofluorocarbons (CFCs) in the atmosphere. The reactions occur at cold temperatures, so the hole reaches a maximum size each year at the end of southern winter, and then heals during the warmer summer months.
Made on the occasion of the 30th anniversary of the Montreal Protocol
Sir David Attenborough narrates the extraordinary history of the Montreal Protocol to raise awareness of the 28th Meeting of the Parties to the Montreal Protocol in Kigali, Rwanda, and efforts to control powerful global warming chemicals hydrofluorocarbons - HFCs - under the Protocol. Reducing HFCs under the Montreal Protocol can avoid 0.5°C of global warming by the end of the century, while continuing to protect the ozone layer.
The Montreal Protocol on Substances that Deplete the Ozone Layer has led to significant environmental, health and economic benefits. Montreal Protocol parties are now working towards reducing global-warming hydrofluorocarbons (HFCs) under the Protocol, to build on the successes achieved by the treaty over the past 30 years.
Mexico's Molina - already a Nobel laureate - was instrumental in the identification of the Antarctic ozone hole...now on the mend due to global action on ozone-depleting substances.