methodical approach to life cycle assessment in the bioeconomy

Which three system boundaries must be explicitly considered and documented when defining the system boundary in a life cycle assessment?

• Technical, temporal, and geographical system boundary

• Economic, political, and legal system boundary

• Input, output, and cost system boundary

• Primary, secondary, and tertiary data boundary

Answer explanation

The correct choice, 'Technical, temporal, and geographical system boundary', highlights essential aspects to define the system boundary in a life cycle assessment, ensuring comprehensive evaluation of the system's context.

Which term describes a system boundary that explicitly includes disposal or recycling?

• cradle-to-gate

• gate-to-gate

• cradle-to-cradle

• gate-to-grave

Answer explanation

The term 'gate-to-grave' describes a system boundary that includes all stages from production to disposal or recycling, making it the correct choice for a system that explicitly considers disposal.

A team is modeling the production of a bio-plastic cup in detail using primary data and is using average data from databases for upstream processes. Which part is the foreground and which is the background system?

• Production = Background; upstream processes = Foreground

• Both belong to the Foreground system

• Production = Foreground; upstream processes = Background

• Both belong to the Background system

Answer explanation

In this context, the production of the bio-plastic cup is the foreground system as it involves detailed modeling with primary data. The upstream processes, using average data, are considered the background system.

Welcher Schwellenwert wird in der Praxis häufig benutzt, um Flüsse je Prozessmodul abzuschneiden (cut off)?

• < 0,5% je Prozessmodul

• < 1% des Gesamtsystems und < 5% je Prozessmodul

• < 10% des Gesamtsystems

• Genau 5% je Prozessmodul

Which data source is explicitly classified as primary data according to the overview?

• Scientific studies and literature

• Supplier information

• Databases (commercial or freely accessible)

• Measurement data from production

Answer explanation

Measurement data from production is considered primary data as it is collected directly from the source during the production process, unlike the other options which are secondary or derived data.

Which statement about database usage in the example inventory is correct?

• Only a global database without regional selection was used.

• Data sets with a German reference are preferred; if not available, European data sets are used, and lastly, global data sets.

• Only internal company measurement data is permitted.

• All data sets must be less than one year old.

Answer explanation

The correct statement highlights the preference for data sets with a German reference, followed by European and then global data sets, indicating a structured approach to data selection.

Which software with an integrated environmental database is mentioned as an example and is subject to fees and registration?

• OpenLCA (open source)

• LCA for Experts (Sphera Solutions, Inc.)

• GaBi Education (free of charge)

• Ecoinvent Editor

Answer explanation

LCA for Experts (Sphera Solutions, Inc.) is a software that requires fees and registration, making it the correct choice. The other options either are open source or free of charge.

Which platform is described as "a collective database on emissions data (CO2 equivalent); global and interdisciplinary"?

• openLCA Nexus

• Climatiq Data Explorer

• EPLCA

• GLAD

Answer explanation

The Climatiq Data Explorer is a global and interdisciplinary platform that serves as a collective database for emissions data, specifically CO2 equivalent, making it the correct choice.

Which database is fee-based and requires registration?

• GOV.UK Conversion Factors

• ProBas

• Ökobau.dat

• ecoinvent

Answer explanation

ecoinvent is a fee-based database that requires registration for access, unlike the other options listed, which are generally free or publicly accessible.

In the table for determining significant parameters, energy supply is identified as a significant parameter. What effect did a change in the electricity mix by ±25% have according to the example?

• A change in CO2 equivalents by ±25% in the overall system

• No measurable change in CO2 equivalents

• A change in CO2 equivalents by ±7% in the overall system

• A reduction in CO2 equivalents by exactly 7%

Answer explanation

A change in the electricity mix by ±25% results in a change of ±7% in CO2 equivalents in the overall system, indicating that while energy supply is significant, the impact is not as drastic as ±25%.