Quiz: Understanding Plastic Biodegradability and Pollution — 12 domande

1. What effect does bamboo’s global transport have on its ability to replace plastics?

A. It decreases CO2 emissions and expands how far it can replace plastics

B. It eliminates the need for harvesting every 3–5 years and boosts replacement

C. It increases CO2 emissions and limits how far it can replace plastics

D. It makes bamboo non-biodegradable and prevents plastic replacement

Answer: (C)

Spiegazione

The excerpt states that because bamboo is often produced in Asia and transported globally, this increases CO2 emissions and limits how far it can replace plastics. Review: Bamboo as a renewable and biodegradable material alternative. Course evidence: "A key disadvantage is transport impact: bamboo is often produced in Asia and transported globally, which increases CO2 emissions and limits how far it can replace plastics."

2. What conditions are stated to mainly cause PLA to break into CO2 and water?

A. Dry conditions without moisture, even if oxygen is present

B. Natural soil or ocean conditions without industrial composting systems

C. Industrial composting at temperatures above 65°C without microorganisms

D. Industrial composting with sufficient oxygen, moisture, and microorganisms up to about 58°C

Answer: (D)

Spiegazione

PLA is stated to mainly break into CO2 and water under industrial composting conditions that include sufficient oxygen (up to about 58°C), moisture, and microorganisms. Review: Poly Lactic Acid (PLA): production, properties, and sustainability trade-offs. Course evidence: "PLA can break into CO2 and water mainly under industrial composting conditions with sufficient oxygen up to about 58°C and with moisture and microorganisms."

3. Biodegradability is best defined as the process in which microorganisms do what?

A. Break plastic bonds using water through hydrolysis

B. Use UV light to damage plastic via photodegradation

C. Have bacteria consume the material until it disappears without mineralisation

D. Convert organic matter into water, methane, and energy, culminating in mineralisation

Answer: (D)

Spiegazione

The definition states that biodegradability is when microorganisms convert organic matter into water, methane, and energy, culminating in mineralisation. Review: Biodegradability processes and environmental conditions. Course evidence: "Biodegradability is the process in which microorganisms convert organic matter into water, methane, and energy, culminating in mineralisation."

4. When a company sells in multiple countries, what is the best way to apply the supply-chain implication of country-by-country packaging rules?

A. Use one packaging design that meets all countries’ regulations

B. Rely on a single supplier because availability is the same everywhere

C. Comply with different packaging and ban rules in each market

D. Avoid recyclable materials to reduce compliance needs

Answer: (C)

Spiegazione

Country-by-country packaging regulations and plastic bans vary, so companies must adapt and comply with different rules in each market—making global supply chains more complex. Review: Business challenges from regulatory complexity and supply chain disruptions. Course evidence: "Packaging regulations and plastic bans vary by country, making global supply chains more complex because companies must comply with different rules in each market."

5. What is the function of meeting packaging requirements for a company’s logistics?

A. To guarantee lower logistics complexity and costs

B. To ensure packaging materials stay unchanged during compliance

C. To eliminate the need to redesign packaging in all markets

D. To force companies to redesign packaging and change logistics

Answer: (D)

Spiegazione

Meeting packaging requirements forces companies to redesign packaging and change logistics. Review: Packaging regulations and their impact on company logistics. Course evidence: "Meeting packaging requirements forces companies to redesign packaging and change logistics."

6. What function does slow decomposition serve in the marine plastic pollution process?

A. It ensures plastics biodegrade completely through microbial processes

B. It prevents plastics from breaking down into microplastics

C. It makes plastics persist as microplastics, so pollution builds up over time

D. It causes plastics to be removed from the ocean over time

Answer: (C)

Spiegazione

The excerpt states that slow decomposition means plastics break down very slowly and persist as microplastics, so pollution builds up over time. Review: Global plastic pollution sources and marine environment effects. Course evidence: "In nature, biodegradation can be partial or complete via microbial processes, but slow decomposition means plastics often break down very slowly and persist as microplastics, so pollution builds up over time."

7. What consequence is directly stated to result from over 90% of plastic going unrecycled?

A. Missing economic opportunity because plastic could become valuable resources with better systems and technologies

B. High waste-management costs for collection, sorting, and disposal

C. Marine plastic pollution costing some countries hundreds of millions in tourism revenue

D. Compliance-driven margin pressure forcing companies to change operations

Answer: (A)

Spiegazione

The passage states that when over 90% of plastic goes unrecycled, it creates “missing economic opportunity” because plastic could become valuable resources with better systems and technologies. Review: Economic consequences and business relevance of plastic waste. Course evidence: "Over 90% of plastic goes unrecycled, creating missing economic opportunity because plastic could become valuable resources with better systems and technologies."

8. If you want a plastic labelled “biodegradable” to break down, what practical step should you take based on how it degrades?

A. Dispose of it in regular recycling to ensure biodegradation

B. Use industrial composting conditions with high heat (around 50°C)

C. Assume it will fully biodegrade without any special environment

D. Rely on natural outdoor conditions to break it down

Answer: (B)

Spiegazione

The source says many plastics labelled biodegradable only degrade under special conditions—like high heat (around 50°C) in industrial composting plants—and do not break down in normal nature. So you must use industrial composting conditions rather than relying on outdoor conditions or regular recycling. Review: Challenges and realities of biodegradable and bio-based plastics. Course evidence: "Many plastics labelled biodegradable only degrade under special conditions, such as high heat (around 50°C) in industrial composting plants, and do not break down in normal nature."

9. Why is cleaning public spaces costly?

A. Because plastic waste is a mismanaged resource problem that is lost through a linear model

B. Because many plastics are not recyclable, which increases system costs

C. Because waste management costs include disposal via landfill or incineration

D. Because plastic waste volumes are high and recycling is complex and costly

Answer: (D)

Spiegazione

Cleaning public spaces is costly because plastic waste volumes are high and recycling is complex and costly. Review: Waste management costs and circular economy implications for companies. Course evidence: "Cleaning public spaces is costly because plastic waste volumes are high and recycling is complex and costly."

10. What is the function of biodegradation in the process described?

A. Pro-oxidant additives accelerate degradation under favourable conditions

B. Polymers are gradually broken down by UV light and oxygen

C. Materials biodegrade under controlled industrial composting conditions

D. Microorganisms convert organic matter into simple natural products

Answer: (D)

Spiegazione

Biodegradation functions as a biological process where microorganisms convert organic matter into simple natural products (like water and CO2/methane), with mineralisation as the final stage. Review: Definitions and classifications of plastic degradation and biodegradability. Course evidence: "Biodegradation is a biological process in which microorganisms convert organic matter into simple natural products like water, CO2/methane, energy, and new biomass, with the final stage being mineralisation."

11. When adopting Sulapac packaging materials, what practical production advantage does the design of its granules provide?

A. Guarantee lower raw material costs than fossil plastics

B. Require rebuilding factories to fit new equipment

C. Eliminate the need for any production system changes

D. Run on existing injection moulding machinery

Answer: (D)

Spiegazione

Sulapac’s granules are designed to run on existing injection moulding machinery, which helps maintain compatibility with current production systems and reduces the need to rebuild factories. Review: Sustainable packaging innovations and market adoption challenges. Course evidence: "Sulapac is compatible with existing production systems because its granules are designed to run on existing injection moulding machinery, reducing the need to rebuild factories."

12. What effect does plastic pollution have on photosynthesis and oxygen when it covers seabeds and coral reefs?

A. It blocks sunlight, reducing photosynthesis and oxygen

B. It removes seabed cover, improving photosynthesis and oxygen

C. It increases sunlight exposure, raising photosynthesis and oxygen

D. It prevents microplastics from entering air and lungs

Answer: (A)

Spiegazione

Plastic pollution causes habitat damage by covering seabeds and coral reefs, which blocks sunlight and leads to reduced photosynthesis and oxygen. Review: Plastic pollution: environmental and ecological impacts. Course evidence: "Plastic pollution causes habitat damage by covering seabeds and coral reefs, blocking sunlight and reducing photosynthesis and oxygen."