O trecho do quarto parágrafo “There are some downsides to bioplastic, however”, estabelece, em

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Believe it or not, the sequins (small plates of shining metal or plastic used for ornamentation, especially on clothing) on this dress are made from 100% bioplastic. Now you might be thinking, what is bioplastic? In this case, bioplastic might be the answer to one of fashion’s most prevalent plastic waste sins: sequins.

In a wider context, instead of relying on petroleum based fossil fuels as its key component (like traditional plastic), bioplastic is created from renewable materials. Like all trees and plants, algae sequesters carbon from the atmosphere. Creating bioplastic from this carbon reservoir results in a product that is carbon neutral. Heat is used to bind the algae together to form the bioplastic. This is then poured into moulds which become sheets. Once cooled, the sheets of bioplastic are finally cut into sequins.

There are many advantages to bioplastic. Perhaps the most obvious is algae, which unlike fossil fuels, is not a scarce resource. Bioplastics also degrade far more quickly, taking 3 to 6 months to decompose fully compared to the hundreds of years regular plastic requires. The carbon released by bioplastic as it decomposes is also equal to the carbon absorbed by the organic material it was made from, so the overall impact on the environment is close to zero.

There are some downsides to bioplastic, however. If not disposed of properly, bioplastic can end up in landfill, where deprived of oxygen, the substance could produce methane as it breaks down – a far more formidable greenhouse gas than CO2.

As promising and forward thinking as these fashion initiatives are, it will take an adjustment of infrastructure to make sure the environment feels the full benefit of bioplastic. With the bioplastic market set to be worth $44 billion by 2022, perhaps that change isn’t a pie in the sky.
(www.globalcitizen.org, 11.03.2021. Adaptado.)

O trecho do quarto parágrafo “There are some downsides to bioplastic, however”, estabelece, em relação ao parágrafo anterior, uma relação de

(A) adição.

(B) explicação.

(C) oposição.

(D) conclusão.

(E) alternância.


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