It's in the stratosphere 50km away from the Earth's surface.
It's an essential gas that protects the Earth from harmful ultraviolet rays from the sun.
The use of ODS (substances that deplete the ozone layer) produces the atmospheric ozone depletion.
The hole in the ozone layer allows entry of most UV rays and involves a cooling of the atmosphere's upper layer.
LESS STRATOSPHERIC OZONE.
Less infrared radiation retention
In the troposphere 10 km away from the Earth's surface.
This gas is harmful to health and contributes to the greenhouse effect.
Human pollution contributes to increased tropospheric ozone.
Tropospheric ozone retains infrared heating and increases the planet heating.
MORE STRATOSPHERIC OZONE
More radiation retention
What are ultraviolet rays?
It's sun energy that reaches the Earth, classified into three types according to their wavelength.
Wavelength between 320 and 400 nm.
It penetrates the atmosphere. Not harmful in controlled sun exposure.
Wavelength between 280 and 400 nm.
The ozone layer absorbs most of these rays. Harmful to health.
Wavelength between 200 and 280 nm.
The ozone layer absorbs them. Very harmful to health.
Ultraviolet radiation's harmful effects on health.
For decades, the concentration of this gas in the atmosphere has been reduced, considerably affecting the ozone layer and creating "holes".
DNA molecules destruction
and reduced growth of plants and crops.
The emission of chlorofluorocarbons (CFCs) into the atmosphere causes the released chlorine atoms (Cl) to destroy the ozone.
WHAT ARE CFCS?
Artificial chemical gases hard to degrade, which have a long-term presence in the atmosphere (50-100 years)
WHERE ARE CFCS FOUND?
International agreements for the protection of the ozone layer
USA National Academy of Sciences
It provides scientific evidence on ozone depletion.
Vienna Convention for the Protection of the Ozone Layer.
Signed by 20 countries to research and control ozone-depleting substances.
Agreements signed by 43 countries to maintain production levels of CFCs from 1986 and reduce them by 50% in 1999, which subsequently would be brought forward to 1996.
30th Anniversary of the Vienna Convention
For the Protection of the Ozone Layer.
September 16th marks the International Day for the Preservation of the Ozone Layer in commemoration of the signing of the Montreal Protocol.