[DOC] [TLE] Ask The Scientist - The Ozone Hole [PAR] The amount of ozone in the stratosphere can vary with location, season and even 
day ... The discovery of the annual depletion of ozone above the Antarctic was 
first ... Clouds Mother of Pearl or Nacreous Clouds) have to form in the ozone 
layer. ... ozone might be affected by the increasing concentration in the 
atmosphere of... [DOC] [TLE] CFCs - The Ozone Hole [PAR] Chlorofluorocarbon (CFC) is an organic compound that contains carbon, chlorine
, ... and completely satisfactory alternative has been discovered for this 
application. ... for chlorofluorocarbons in refrigerants began in the late 1970s after 
the first ... atmosphere, enabling them to break down before reaching the ozone 
layer. [DOC] [TLE] Questions and Answers About the Ozone Layer - The Ozone Hole [PAR] Ozone fs presence in the atmosphere was later discovered using chemical and ... 
of ozone in our atmosphere, one can imagine bringing all the ozone molecules in 
the ... In the mid-1970s, it was discovered that gases containing chlorine and .... (
CFCs) and other ozone-depleting substances on the global ozone layer,... [DOC] [TLE] Ozone depletion - Wikipedia [PAR] Ozone Depletion describes two distinct but related phenomena observed since 
the late 1970's: ... CFCs and other contributory substances are referred to as 
ozone-depleting .... been discovered that lead to ozone destruction in the lower 
stratosphere as well. ..... Thus human activity could affect the stratospheric ozone 
layer. [DOC] [TLE] Ozone Layer and Causes of Ozone Depletion - Conserve Energy ... [PAR] Ozone layer is a deep layer in earth's atmosphere that contain ozone which is a 
... The ozone layer was discovered in 1913 by the French physicists Charles ... of 
the harmful ultraviolet radiations that sun emit and which can produce long ... The 
scientists have observed reduction in stratospheric ozone since early 1970s. [DOC] [TLE] Ozone depletion: Uncovering the hidden hazard of hairspray [PAR] A usual morning routine might include a spritz of hairspray, a spurt of shaving ... 
everyday activities could be affecting the atmosphere ten miles above Earth's ... 
in the 1970s, chemists Mario Molina and F. Sherwood Rowland discovered just 
that. ... When Molina and Rowland began their work, CFCs were used in all kinds 
of... [DOC] [TLE] Putting the pieces together - Understanding Science [PAR] A 1970s photo of F. Sherwood Rowland (left) and Mario Molina in the lab. ... No 
known chemical processes seemed to be able to affect CFCs in the lower 
atmosphere. ... The ozone layer protects Earth from dangerous UV radiation  
which can ... actually going on, why hadn't atmospheric scientists discovered it 
already? [DOC] [TLE] ESRL Global Monitoring Division - Education and Outreach [PAR] Does ozone layer depletion have anything to do with global warming and climate 
change? ... CFCs can remain in the atmosphere for as long as a century, 
meaning that ... In the 1970s it was discovered that man-made chemicals called 
... Changes in ozone concentration in the atmosphere affect ultra violet (UV) 
radiation. [DOC] [TLE] Depletion of the Ozone Layer - Chemistry LibreTexts [PAR] Sep 30, 2014 ... The atmosphere of the Earth is divided into five layers. ... the ozone layer 
because UV-B radiation causes skin cancer and can lead ... Molina discovered 
that chlorofluorocarbons could be photolyzed by .... Examination of NASA 
satellite data later showed that the hole had begun to develop in the mid 1970's. [DOC] [TLE] Ozone depletion [PAR] Ozone depletion may also contribute to changes in the Earth's climate (see 
Chapter 3). ... layer resides in the stratosphere between 15km and 50km altitude (
Figure 1). ... Stratospheric ozone is also affected by the abundance of carbon 
dioxide ... (primarily CFCs 11 and 12) increased during the 1960s and early 
1970s,... [DOC] [TLE] NASA - Discovering the Ozone Hole: Q&A With Pawan Bhartia [PAR] Sep 17, 2012 ... Pawan Bhartia is an atmospheric scientist at NASA's Goddard Space ... to phase 
out substances that deplete Earth's protective ozone layer. ... Starting with 
Nimbus-4 in 1970, we simply wanted to measure the atmosphere. ... Two 
scientists in California had discovered a new mechanism

Question: In the 1970s it was discovered that CFCs may be affecting this layer of atmosphere
Answer: the ozone layer