"Biodegradable Plastic Bags, Not So Biodegradable"

Question

by Vicky Stein

The average person uses a typical plastic bag for as short a time as 12 minutes before throwing it away, never thinking of where it may end up.

Yet once consigned to a landfill, that standard grocery store tote takes hundreds or thousands of years to break down — much more than a human lifetime. Bags make up an alarming amount of the plastic found in whale stomachs or bird nests, and it’s no wonder — globally, we use between 1 and 5 trillion plastic bags each year.

Biodegradable plastic bags are marketed as more eco-friendly solutions, able to break down into harmless material more quickly than traditional plastics. One company claims their shopping bag “will degrade and biodegrade in a continuous, irreversible and unstoppable process” if it ends up as litter in the environment.

In a study published this week in Environmental Science and Technology, researchers put supposedly eco-friendly bags made from various organic and plastic materials and sourced from U.K. stores to the test. After three years buried in garden soil, submerged in ocean water, exposed to open light and air or stashed in a laboratory, none of the bags broke down completely in all the environments.

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Question
Use the article to answer the question.

In 3–5 sentences, explain one example of valid reasoning and explain how that example strengthens the overall argument.

(4 points)

Short Answer Rubric (4 points)
Points Awarded Criteria
4
The answer is very clear.

The answer is fully supported by details.

There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

3
The answer is mostly clear.

The answer is supported by mostly relevant details.

There are a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

2
The answer is somewhat clear.

Details are weak or not related.

There are some errors in grammar, usage, and mechanics. Errors interfere with meaning.

1
The answer is not clear.

There are few or no supporting details.

There are many errors in grammar, usage, and mechanics. Errors interfere with meaning.

0 The question is not answered.

Answer 1

One example of valid reasoning in the article is the study published in Environmental Science and Technology, which tested biodegradable plastic bags made from various organic and plastic materials. The fact that after three years in different environments, none of the bags fully broke down strengthens the overall argument by providing empirical evidence that challenges the claim of biodegradable bags being eco-friendly. This research directly undermines the marketing assertions of manufacturers, suggesting that even products labeled as biodegradable may not significantly reduce plastic pollution, ultimately supporting the argument that these bags are not as environmentally beneficial as advertised.