Environmental performance, sustainability and improvement
This domain tests how performance is measured, compared and reported, and what genuine improvement looks like. Expect questions on performance indicators and normalisation, carbon accounting scopes, life cycle assessment, circular economy, sustainability reporting, and the practical meaning of continual improvement.
Choose indicators that answer the question
Absolute indicators (total tonnes CO2e, total water abstracted) show the size of the burden; intensity indicators (per tonne produced, per unit of revenue, per occupied m²) allow comparison between sites and across time. Use both, because intensity can improve while absolute impact grows.
Carbon accounting boundaries
The GHG Protocol defines Scope 1 (direct combustion, process and fleet emissions), Scope 2 (purchased electricity, heat and steam, reported location-based and market-based) and Scope 3 (value-chain emissions across 15 categories). Boundaries must be stated: operational control versus equity share, plus a base-year recalculation policy for acquisitions and divestments.
Life cycle and circularity
ISO 14040/14044 LCA uses a functional unit, inventory, impact assessment and interpretation, exposing burden-shifting - for example a lighter bottle that takes more energy to recycle. Circular approaches such as design for disassembly, take-back and recycled content reduce resource dependence but should be tested for energy and toxicity trade-offs.
Worked example
Output 50,000 t with 12,000 tCO2e = 0.24 t/t. Next year 60,000 t with 13,200 tCO2e = 0.22 t/t. Intensity improved by about 8% but absolute emissions rose 10%. Reasoning: the site is more efficient per unit yet adds more to the atmosphere, so an absolute, science-aligned target and growth-decoupling measures are needed; reporting only the intensity figure would mislead.
Traps
- Mixing Scope 2 methods between years without disclosure.
- Reporting intensity only during a period of growth.
- Treating ISO 14001 certification or EMAS registration as proof of performance.
- Claiming "carbon neutral" without stating scope, boundary and offsets.