Collaborative research on three modelled Australian dietary scenarios: 1.4, 1.7 and 2.1 kg CO₂-e per day. These are scenario estimates, not measured emissions savings.
Method
- Australian Health Survey (2011–12) dietary data: 9,341 adult 24-hour recalls.
- Baseline (ASD), energy-dense (EDAD) and post-bariatric recovery (PBRD) profiles harmonised into AUSNUT food groups.
- Food-group expenditures mapped to 2018 Australian EEIO results; emissions expressed as kg CO₂-e.
Findings
- Modelled footprints: PBRD 1.4, ASD 1.7 and EDAD 2.1 kg CO₂-e per person per day.
- Lower post-bariatric emissions were driven mainly by reduced total intake and smaller meat portions.
- Animal-based foods made up less than a third of diet mass but around half of emissions.
- Post-bariatric diets still rely heavily on dairy, a trade-off between protein recovery needs and emissions.
- My part
- Presented the research; constructed and compared the dietary profiles under supervision.
- Collaborators
- Supervised by Fabian Sack and Louise Hansell (Sydney Environment Institute). Special thanks to Raymond van der Zalm and Navoda Liyana Pathirana.
Limitation: Discretionary foods, tofu and seafood were excluded due to lack of FAO farm-gate data.