Did humans increase the ozone layers Density?
Answers
The Sun's UV radiation is absorbed by the ozone layer. Ozone consists of oxygen atoms bonded in threes (O3); we breathe oxygen that's bonded in pairs, or O2. Ozone forms in the mid-stratosphere.
Without the ozone layer, the Earth's surface would be sterilized by UV radiation. The breakdown of the ozone layer increases skin cancer and cataracts in humans, impairs immune systems of all animals (including humans), and interferes with phytoplankton productivity in the oceans.
Humans have impacted the ozone layer: Chlorofluorocarbons (CFCs) used for refrigeration, cleaning solvents, and aerosol sprays since the 1950s help destroy ozone. Ozone became strongly depleted over the Earth's polar regions in the later part of the 20th century.
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Human activities cause ozone depletion and global warming
Ozone (O3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.
Global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.
Carbon dioxide spreads around the planet like a blanket, and is one of the main gases responsible for the absorption of infrared radiation (felt as heat), which comprises the bulk of solar energy.
Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere (see details below).
Ozone sits in the upper atmosphere and absorbs ultraviolet radiaton, another type of solar energy that's harmful to humans, animals and plants. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity.
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