fifteen to thirty five kilometers above Earth’s surface a gas called ozone
Earth’s surface a gas called ozone
Earth’s surface a gas called ozone surrounds the planet the ozone layer
surrounds the planet the ozone layer
surrounds the planet the ozone layer acts as a barrier between Earth and
acts as a barrier between Earth and
acts as a barrier between Earth and ultraviolet radiation from the Sun
ultraviolet radiation from the Sun
ultraviolet radiation from the Sun however pollution has caused the ozone
however pollution has caused the ozone
however pollution has caused the ozone layer too thin exposing life on Earth to
layer too thin exposing life on Earth to
layer too thin exposing life on Earth to dangerous radiation Earth’s atmosphere
dangerous radiation Earth’s atmosphere
dangerous radiation Earth’s atmosphere is made up of six layers the second
is made up of six layers the second
is made up of six layers the second layer called the stratosphere contains
layer called the stratosphere contains
layer called the stratosphere contains the ozone layer the ozone layer is made
the ozone layer the ozone layer is made
the ozone layer the ozone layer is made up of a highly reactive molecule called
up of a highly reactive molecule called
up of a highly reactive molecule called ozone which contains three oxygen atoms
ozone which contains three oxygen atoms
ozone which contains three oxygen atoms ozone is a trace gas in the atmosphere
ozone is a trace gas in the atmosphere
ozone is a trace gas in the atmosphere there are only about three molecules for
there are only about three molecules for
there are only about three molecules for every 10 million molecules of air but it
every 10 million molecules of air but it
every 10 million molecules of air but it does a very important job the ozone
does a very important job the ozone
does a very important job the ozone layer acts as Earth’s sunscreen
layer acts as Earth’s sunscreen
layer acts as Earth’s sunscreen absorbing about 98% of damaging
absorbing about 98% of damaging
absorbing about 98% of damaging ultraviolet or UV light but the ozone
ultraviolet or UV light but the ozone
ultraviolet or UV light but the ozone layer has gotten thinner chemicals
layer has gotten thinner chemicals
layer has gotten thinner chemicals called chlorofluorocarbons or CFCs are
called chlorofluorocarbons or CFCs are
called chlorofluorocarbons or CFCs are the primary culprits in ozone layer
the primary culprits in ozone layer
the primary culprits in ozone layer breakdown a CFC is a molecule that
breakdown a CFC is a molecule that
breakdown a CFC is a molecule that contains the elements carbon chlorine
contains the elements carbon chlorine
contains the elements carbon chlorine and fluorine CFCs are mostly found in
and fluorine CFCs are mostly found in
and fluorine CFCs are mostly found in refrigerants aerosols and plastic
refrigerants aerosols and plastic
refrigerants aerosols and plastic products when CFCs are exposed to
products when CFCs are exposed to
products when CFCs are exposed to ultraviolet rays in the atmosphere they
ultraviolet rays in the atmosphere they
ultraviolet rays in the atmosphere they break down into substances that include
break down into substances that include
break down into substances that include chlorine the chlorine reacts with the
chlorine the chlorine reacts with the
chlorine the chlorine reacts with the oxygen atoms in ozone and rips apart the
oxygen atoms in ozone and rips apart the
oxygen atoms in ozone and rips apart the ozone molecule
areas of damage in the ozone layer are
areas of damage in the ozone layer are often called ozone holes but that name
often called ozone holes but that name
often called ozone holes but that name is misleading ozone layer damage is more
is misleading ozone layer damage is more
is misleading ozone layer damage is more like a thin patch with the thinnest
like a thin patch with the thinnest
like a thin patch with the thinnest areas near the poles the ozone layer
areas near the poles the ozone layer
areas near the poles the ozone layer above the Antarctic in particular has
above the Antarctic in particular has
above the Antarctic in particular has been impacted by pollution since the mid
been impacted by pollution since the mid
been impacted by pollution since the mid 1980s there the region’s low
1980s there the region’s low
1980s there the region’s low temperatures speed up the conversion of
temperatures speed up the conversion of
temperatures speed up the conversion of CFCs to ozone damaging chlorine about
CFCs to ozone damaging chlorine about
CFCs to ozone damaging chlorine about 90% of CFCs currently in the atmosphere
90% of CFCs currently in the atmosphere
90% of CFCs currently in the atmosphere were emitted by industrialized countries
were emitted by industrialized countries
were emitted by industrialized countries in the northern hemisphere in 1989 the
in the northern hemisphere in 1989 the
in the northern hemisphere in 1989 the Montreal Protocol banned the production
Montreal Protocol banned the production
Montreal Protocol banned the production of ozone depleting substances since then
of ozone depleting substances since then
of ozone depleting substances since then the amount of chlorine and other ozone
the amount of chlorine and other ozone
the amount of chlorine and other ozone depleting elements in the atmosphere
depleting elements in the atmosphere
depleting elements in the atmosphere have been falling scientists estimate
have been falling scientists estimate
have been falling scientists estimate that chlorine levels will return to
that chlorine levels will return to
that chlorine levels will return to their natural state in about 50 years by
their natural state in about 50 years by
their natural state in about 50 years by then the Antarctic ozone hole will
then the Antarctic ozone hole will
then the Antarctic ozone hole will shrink to smaller than 8 million square
shrink to smaller than 8 million square
shrink to smaller than 8 million square miles
miles
miles [Music]
”
Be First to Comment