Hole in the ozone layer,
located in Antartica
What is?
It is the depletion of the ozone layer in the
stratosphere. An annual phenomenon observed during spring in the polar regions.
A surprise to the scientific community, because they observed that the decline
in the ozone layer was much larger than anyone had anticipated.
Causes
If the ultraviolet radiation reaches the surface of
the earth, there would be no life as we know it, since organic molecules are
destroyed by ultraviolet radiation. A
main cause of this impact has been the industrial use of compounds such as
CFC´S.
They are gases employed in many applications,
particularly in the refrigeration industry (refrigerators, freezers, air
conditioners, aerosols and packaging manufacturing).
These gases in the stratosphere trigger releasing CI
atoms after decomposition by sun light; each CI atom destroys thousands of
ozone molecules and turning them into dioxygen. This means that the chlorine
liberated in the process of dissociation, causes the damage to ozone.
How does the hole in the ozone layer affect life?
o
It allows more ultraviolet rays pass,
causing skin of cancer, blindness and the death of plants in areas near to the
poles.
o
It affects wildlife in Antartica
because UV rays kill microorganism which maintain the trophic mains in the
ecosystems.
o
And the risk, can be that they could
be extended to residential areas where people life.
Silvia Román and Paula Sánchez 1ºB Bachillerato
No hay comentarios:
Publicar un comentario