Human beings are destroying The Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago.
We the human being destroy it’s natural wildlife by burning oil,coal,gass,and many other things.Like plastic is the most most useful thing in this earth that everybody use it in his daily life. But in many ways it is harmful for the animal all over the world.
Plastic is a polymeric material—that is, a material whose molecules are very large, often resembling long chains made up of a seemingly endless series of interconnected links. Natural polymers such as rubber and silk exist in abundance, but nature’s “plastics” have not been implicated in environmental pollution, because they do not persist in the environment. Today, however, the average consumer comes into daily contact with all kinds of plastic materials that have been developed specifically to defeat natural decay processes—materials derived mainly from petroleum that can be molded, cast, spun, or applied as a coating. Since synthetic plastics are largely nonbiodegradable, they tend to persist in natural environments. Moreover, many lightweight single-use plastic products and packaging materials, which account for approximately 50 percent of all plastics produced, are not deposited in containers for subsequent removal to landfills, recycling centres, or incinerators. Instead, they are improperly disposed of at or near the location where they end their usefulness to the consumer. Dropped on the ground, thrown out of a car window, heaped onto an already full rubbish bin, or inadvertently carried off by a gust of wind, they immediately begin to pollute the environment. Indeed, landscapes littered by plastic packaging have become common in many parts of the world. (Illegal dumping of plastic and overflowing of containment structures also play a role.) Studies from around the world have not shown any particular country or demographic group to be most responsible, though population centres generate the most litter. The causes and effects of plastic pollution are truly worldwide.
We the human being destroy it’s natural wildlife by burning oil,coal,gass,and many other things.Like plastic is the most most useful thing in this earth that everybody use it in his daily life. But in many ways it is harmful for the animal all over the world.
Plastic is a polymeric material—that is, a material whose molecules are very large, often resembling long chains made up of a seemingly endless series of interconnected links. Natural polymers such as rubber and silk exist in abundance, but nature’s “plastics” have not been implicated in environmental pollution, because they do not persist in the environment. Today, however, the average consumer comes into daily contact with all kinds of plastic materials that have been developed specifically to defeat natural decay processes—materials derived mainly from petroleum that can be molded, cast, spun, or applied as a coating. Since synthetic plastics are largely nonbiodegradable, they tend to persist in natural environments. Moreover, many lightweight single-use plastic products and packaging materials, which account for approximately 50 percent of all plastics produced, are not deposited in containers for subsequent removal to landfills, recycling centres, or incinerators. Instead, they are improperly disposed of at or near the location where they end their usefulness to the consumer. Dropped on the ground, thrown out of a car window, heaped onto an already full rubbish bin, or inadvertently carried off by a gust of wind, they immediately begin to pollute the environment. Indeed, landscapes littered by plastic packaging have become common in many parts of the world. (Illegal dumping of plastic and overflowing of containment structures also play a role.) Studies from around the world have not shown any particular country or demographic group to be most responsible, though population centres generate the most litter. The causes and effects of plastic pollution are truly worldwide.
Since the large-scale
production of synthetic materials began in the early 1950s, humans just can’t
get enough of plastic. We love them so much that we have produced up to 8.3
billion metric tons. Out of these, at least 6.3 billion tons have become waste.
Only a meagre 9% was recycled, 12% incinerated and 79% accumulated in landfills
or the natural environment.
Across the world,
plastic production and consumption is growing and shows no signs of slowing.
Production leaped from 2 million metric tons in 1950 to over 400 million metric
tons by 2015, outgrowing the production of most other human-made materials like
steel and cement. Moreover, while some of the other materials will have decades
of use, plastic is the opposite. The largest market for plastics is packaging,
and most products are only used once and discarded. Also, most plastics are
non-biodegradable and the waste generated could last for hundred or even
thousands of years.
It is therefore good news that scientists in Britain and the
United States have engineered a plastic-eating enzyme. The natural enzyme is
thought to have evolved in a waste recycling centre in Japan. With potential to
help fight against pollution, the enzyme is able to digest polyethylene
terephthalate, or PET – a form of plastic patented in the 1940s and now
popularly used in millions of tons of plastics. PET plastics can persist for
hundred of years in the environment, resulting in pollution of large areas of
land and sea worldwide.
By adding some amino acids to the structure of the natural enzyme,
the scientists were able to achieve a serendipitous change in the enzyme’s
actions, allowing its plastic-eating abilities to work faster. This further
demonstrates the potential to optimize the enzyme even further.
To reduce plastic footprint from the ocean we have to be aware of the harmful effect of it's .
No comments