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debate sobre los plásticos, Apuntes de Química

debate sobre los usos del plastico

Tipo: Apuntes

2018/2019

Subido el 29/12/2019

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The production of plastics increased by more than
twenty-fold between 1964 and 2015, with an annual
output of 322 million metric tons (Mt), and is expected to
double by 2035, and almost quadruple by 2050. Plastics
contribute to economic growth, but their current
production and use pattern, on a linear model of ‘take,
make, use, and dispose’, is a primary driver of natural
resource depletion, waste, environmental degradation,
climate change, and has adverse human health effects.
The circular economy is an alternative to the current
linear, make, use, dispose, economy model, which aims
to keep resources in use for as long as possible, to
extract the maximum value from them whilst in use, and
to recover and regenerate products and materials at the
end of their service life. It offers an opportunity to
minimise the negative impacts of plastics while
maximising the benefits from plastics and their products,
and providing environmental, economic, and societal
benefits. Circular economy solutions for plastics include:
producing plastics from alternative non-fossil fuel
feedstocks; using plastic wastes as a resource;
redesigning plastic manufacturing processes and
products to enhance longevity, reusability and waste
prevention; collaboration between businesses and
consumers to encourage recycling and increase the
value of plastic products; encouraging sustainable
business models which promote plastic products as
services, and encourage sharing and leasing;
developing robust information platforms to aid circular
solutions; and adopting fiscal and regulatory measures
to support the circular economy.
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The production of plastics increased by more than twenty-fold between 1964 and 2015, with an annual output of 322 million metric tons (Mt), and is expected to double by 2035, and almost quadruple by 2050. Plastics contribute to economic growth, but their current production and use pattern, on a linear model of ‘take, make, use, and dispose’, is a primary driver of natural resource depletion, waste, environmental degradation, climate change, and has adverse human health effects. The circular economy is an alternative to the current linear, make, use, dispose, economy model, which aims to keep resources in use for as long as possible, to extract the maximum value from them whilst in use, and to recover and regenerate products and materials at the end of their service life. It offers an opportunity to minimise the negative impacts of plastics while maximising the benefits from plastics and their products, and providing environmental, economic, and societal benefits. Circular economy solutions for plastics include: producing plastics from alternative non-fossil fuel feedstocks; using plastic wastes as a resource; redesigning plastic manufacturing processes and products to enhance longevity, reusability and waste prevention; collaboration between businesses and consumers to encourage recycling and increase the value of plastic products; encouraging sustainable business models which promote plastic products as services, and encourage sharing and leasing; developing robust information platforms to aid circular solutions; and adopting fiscal and regulatory measures to support the circular economy.

Looking into the future, the GEF should consider: supporting the development of circular economy indicators relevant to its work; collaborating with, and supporting partnerships and projects aimed at tackling the global plastic challenge, and facilitating and supporting innovation and applied research related to implementing the circular economy into the plastics sector. Improve plastic waste management to end landfill, incineration and leakages of plastic into the environment. Let’s ensure a responsible, local management of plastic waste by empowering producers, retailers and municipalities to achieve maximum collection and safe recycling, while avoiding leakages into the environment. The key? Improved collection, better monitoring and economic incentives to support safe recycling and discourage the use of virgin plastic. PROS OF PLASTIC Plastic surrounds us. Our telephones, our carpets, and even the fleece we’re wearing all may contain plastic. We store our food in it, drink water from it, and even brush our teeth with it. It’s cheap, convenient, and versatile–but how much do we really know about this wonder material? Plastic is made from hydrocarbons found in oil and natural gas. It’s created when small molecules, called

containing them are discarded. These chemicals are building up in our bodies and in our environment. But according to the SPI, only 9 percent of waste in landfills is plastic. They say plastic can be an environmentally friendly, low-cost alternative to other products. Think for a moment of plastic grocery bags. They take up one-seventh of the space paper bags do in landfills and don’t produce toxic fumes when incinerated, says the SPI, who also note that incinerated plastic helps the waste mix burn more efficiently. Still, like ’em or not, plastics are here to stay. So do your part and become plastic savvy. Familiarize yourself with what plastics can be recycled, and keep reusable plastics out of landfills.

CONS OF PLASTIC

Disposable plastics used in packaging foodstuff meant for human consumption contain harmful compounds. Improper disposal of these packaging products leads to these harmful compounds finding their way to water bodies, where they dissolve over a long time due to their non-biodegradable nature. Littered plastics are also harmful to animals because they occasionally eat them and die. Additionally, plastics fabrication involves the use of potentially dangerous chemicals, which are added as stabilizers or colorants. Most of these chemicals have not undergone an ecological risk appraisal, and their impact on human well-being and the environment is presently vague. One example is phthalates, which are used in the manufacture of PVC. Environmental Degradation Plastics are generally non-biodegradable; hence, they may take centuries to decay. This is due to the intermolecular bonds that constitute plastics, whose structure ensures that the plastics neither corrode nor decompose. Plastics disposed of indecently get washed away to water reservoirs. They clog waterways and float on reservoirs, polluting and making them unsightly. Low Melting Point Plastics generally have a low melting point, so they can't be used where heat levels are high. This also means they cannot be used as protective barrier for furnaces. Some plastic products are highly flammable -- polystyrene, acrylics, polyethylene and nylons