In the last decade, the number of ozone holes on earth has
increased to five with a total area of nearly 40 million
square kilometers, nearly one tenth of the area of earth's
surface. If this lasts long, the sun's ultraviolet rays
will devastate humans and animals.
According to the reports of foreign media, experts from
the Russian Academy of Sciences have conducted researches
and experiments on four excavated "dinosaur cemeteries" in
the far east of Russia. They believe that the extinction of
dinosaurs is closely related to the hole in the ozone layer.
In 1985, the British Antarctic Exploration Team first found
a hole in the ozone layer over Antarctica, which was about the
size of the United States. It shocked the whole world and
the scientific community.
According to relevant information, the ozone hole had once
spread over the southernmost tip of South America in
October,1994. The largest hole in the ozone layer to date
has emerged over the South Pole from September to December
in 1998, as one monitoring report from Japanese Environment
Agency said so. The hole, which can reach 27.2 million square
kilometers, is the largest hole in the ozone layer in history
and has the longest duration. This is enough to show that
ozone in the upper atmosphere is still declining. The report
also noted that the amount of ozone over Hokkaido has
decreased by nearly 3.3 percent over the past decade.
Since 1999, the hole in the ozone layer over Antarctica has
nearly doubled to 21 million square kilometers, larger than
twice of the area of China.
The serious destruction of the ozone layer has increased the
risk of skin cancer in humans. According to a survey conducted
by insiders, a 1% reduction in ozone increases the number of
patients of skin cancer by about 6%, who mainly suffer from
melanoma. When the Freon released by the refrigerator evaporates
into gas, it will harm human eyes and increase the number of
cataract patients, adding 10,000 to15,000 people with blindness
caused by cataract. If measures are not taken to decrease the
ozone hole, there will be about 18 million cataracts by 2075.
At the same time, it can weaken human immunity and increase
patients with infectious diseases.
The emergence of ozone holes has resulted in the imbalance
of global ecosystem. Scientists have been experimenting with
reduced production and quality of agricultural products. The
increased sensitivity of more than 200 crops to ultraviolet
radiation has shown that nearly two-thirds of the decline in
crop yields is linked to the ozone holes. The scientists also
calculated that 1% reduction in ozone would mean 1% reduction
in soybean production.
In addition, ozone holes have greatly reduced fishery production
as well. Ultraviolet radiation can also kill single-celled marine
plankton within the depth of 10 meters. And it can also destroy
To anyone's surprise, the main culprit of ozone holes is the
frequent use of refrigerant like chlorofluorocarbons in industry
and life. It has never occurred to human beings that, while
benefiting human beings, fluorochlorocarbons will also run into
the sky leading to disasters and bring "the ultimate devastation"
to the human world.
The sky people look up at every day is now riddled with holes,
and the sum of the ozone holes has now exceeded the total area
of four China.
The ozone layer can absorb the sun ultraviolet ray that
is harmful to life on earth. It is the protective umbrella
of all life on earth, the natural barrier that protects mankind.
Without it, all life on earth would be destroyed. That is why
the United Nations government has repeatedly stressed the harm of
After a large amount of depletion of the ozone layer, its ability
to absorb ultraviolet radiation is greatly weakened, resulting in
a significant increase in the amount of ultraviolet radiation reaching
the earth's surface, which brings various hazards to human health and
the ecological environment. Ozone is the main component absorbing the
sun's ultraviolet rays. And the most obvious harm caused by the
destruction of the ozone layer is to increase the risk of skin
cancer in humans when exposing them to more intense ultraviolet