GCSE Chemistry - Life Cycle Assessments (LCAs) #73

The video tutorial explains life cycle assessments, which evaluate the environmental impact of a product throughout its life cycle. It covers the four main stages: extracting raw materials, manufacturing, usage, and disposal. The tutorial compares plastic and paper bags, highlighting their environmental impacts at each stage. It also discusses the limitations of life cycle assessments, such as the complexity of quantifying all steps and potential manipulation for corporate benefit.

What is the primary goal of conducting a life cycle assessment?

• To increase product sales

• To assess the environmental impact of a product

• To improve manufacturing efficiency

• To reduce production costs

Which of the following is a major concern during the extraction and processing of raw materials?

• Increased product lifespan

• Direct damage to local environments

• Enhanced product quality

• Reduced energy consumption

What is a common environmental issue associated with manufacturing and packaging?

• Decreased energy use

• Release of pollutants

• Increased biodiversity

• Improved air quality

How do plastic bags generally compare to paper bags in terms of usage?

• Plastic bags can be reused multiple times

• Paper bags are more durable

• Paper bags are waterproof

• Plastic bags are typically single-use

Why are plastic bags considered problematic for disposal?

• They decompose quickly

• They take up space in landfills

• They are non-toxic

• They are biodegradable

What is a significant challenge in conducting life cycle assessments?

• Excessive simplicity

• Difficulty in quantifying all steps

• Limited product range

• Lack of available data

How can life cycle assessments be manipulated?

• By reducing product costs

• By supporting a particular company

• By increasing product lifespan

• By simplifying calculations