degrading plastics are contributing to climate change: scientists discover some greenhouse gases are produced when plastics are exposed to sunlight - polyethylene terephthalate film
As scientists reveal that sunlight forces plastics to break down and release greenhouse gases into the atmosphere, plastic pollution maps become thicker and thicker.
Methane and ethylene are usually produced by natural degradation of various commercial plastic wastes.
The researchers found that the polymer polyethylene used in plastic bags is the most serious criminal and most likely to produce a large amount of atmospheric pollutants.
The study, published today on plos one, focuses on the behavior of plastics under prolonged sunlight.
Researchers at the University of Hawaii will be polycarbonate, acrylic, polypropylene, and polybendiester (PET)
, Polystyrene, high-
Density Polyethylene (HDPE)and low-
Density Polyethylene (LDPE).
These plastics are used in plastic pipes, food packaging, handbags and textiles.
Polyethylene used in plastic bags is the most widely produced and discarded synthetic polymer in the world.
It is also the place where methane and ethylene emit the most, both of which warm the atmosphere and cause global warming.
The researchers found that the decomposition and emission of gas caused by solar radiation continued even in the dark.
Professor David Carr, senior author of research at the University of Hawaii's School of Marine and Earth Sciences and Technology, said: "Plastics represent a source of climate --
As more plastics grow and accumulate in the environment, associated trace gases are expected to increase.
"When assessing the global methane and ethylene cycles, there is no budget for this source --
And it may be significant.
Production of plastic
Started about 70 years ago.
It is expected to double in the next 20 years.
Their durability and low cost make them attractive, although they are known to release multiple chemicals during degradation
Endangering organisms and ecosystems
The US team said the discovery was "unexpected ".
He said the researchers also found an increase in the number of Virgin LDPE particles at the rate of exhaust emissions generated. A-212day experiment.
Lead author Dr. Sarah
Jenny Royer of the University of Hawaii's microbial ocean center said: "We attribute greenhouse gas emissions over time to from raw particles to photos --
Degradation of plastic, and the formation of a surface layer with cracks, MicroCracks and pits.
Over time, these defects increase the surface area that can be used for further photographing
Chemical degradation, therefore, helps to speed up the production of gas.
She said the smaller "plastic"
Eventually through degradation of tiny particles produced in the environment
The production of greenhouse gases can be further accelerated.
Greenhouse gases that directly affect climate change
Affects sea level and global temperatures and the health of terrestrial and marine ecosystems.
They also triggered storms of flooding, drought and increased erosion.
Dr. Royer said: "Given the amount of plastic washing ashore on our coastline and the amount of plastic exposed to environmental conditions, our findings provide further evidence that we need to go from the source
Especially disposable plastic.
She is now working to estimate the amount of plastic exposed to the environment in marine and land areas around the world to limit the overall greenhouse gas emissions of plastics.
Plastics have had a devastating effect on the Earth, and they interfere with ecosystems around the world.
The Daily Mail leader has requested a fee to reduce the number of plastic bags and is launching a campaign for a deposit return program to reduce the amount of plastic bottles dumped in our rivers and oceans
Millions of tons of plastic waste flow into the sea every year.
But for now, emissions from dumping plastics have not been included in estimates of greenhouse gas emissions.
The number of plastic bags found in the waters around the UK has dropped sharply, thanks to charges for plastic bags across Europe.
Ireland and Denmark were the first two countries to collect plastic bag taxes from stores in 2003, followed by many other European countries.
In 2015, Britain was the last UK country to introduce the technology.
Earlier this year, British scientists found that the number of undersea plastic bags dropped by 30 from Norway and Germany to large areas in northern France and western Ireland.
The researchers say the pollution of plastic bags measured since 2010 has declined-around the medium term
The entry into force of the charging policy indicates the power of such taxation.