Sustainability, energy and environmental management
This domain tests carbon and energy accounting literacy plus the environmental regulatory instruments that shape transport and logistics projects in Hong Kong.
Accounting boundaries
GHG Protocol scopes: scope 1 direct fuel; scope 2 purchased electricity; scope 3 value-chain emissions including upstream fuel, contracted transport and business travel. State the boundary before quoting a number. Distinguish tank-to-wheel from well-to-wheel - a battery-electric vehicle can look zero-emission at the tailpipe yet carry grid and manufacturing emissions.
Worked example
A fleet of 20 rigid trucks runs 60,000 km/yr each at 30 L/100 km diesel; diesel emission factor 2.68 kg CO2/L.
- Fuel = 20 × 60,000 × 0.30 = 360,000 L.
- Scope 1 CO2 = 360,000 × 2.68 = 964,800 kg ≈ 965 t.
Replacing with battery-electric trucks at 1.1 kWh/km and a grid factor of 0.39 kg CO2/kWh: electricity = 20 × 60,000 × 1.1 = 1,320,000 kWh; scope 2 = 1,320,000 × 0.39 = 514,800 kg ≈ 515 t, a 47% cut at the point of use. A complete answer then adds vehicle embodied emissions, charger upgrades, payload penalties and local air-quality (NOx, PM) benefits, which are separate from the carbon case.
Regulatory and management tools
- Environmental Impact Assessment Ordinance (Cap 499): EIA report, public inspection, Environmental Permit with conditions.
- Building Energy Efficiency Ordinance (Cap 610): energy audits and retro-commissioning for prescribed buildings.
- ISO 14001 environmental management systems; BEAM Plus for buildings; ISO 50001 for energy.
- Marine: IMO 2020 global 0.50% sulphur cap, 0.10% in emission control areas, EEDI/EEXI design indices and CII carbon-intensity ratings A–E.
- Modal shift to rail and water, fleet renewal to Euro VI or electric, route optimisation and idle-reduction.
Traps that cost marks
- Mixing tank-to-wheel and well-to-wheel figures in one comparison.
- Reporting absolute tonnes without an intensity metric (g CO2e per tonne-km or per TEU).
- Claiming carbon neutrality from offsets without stating boundary and residual emissions.
- Treating air-quality benefits as carbon benefits, or vice versa.