Presentation at the 5th Global Science Conference on Climate-Smart Agriculture. Title: Analysing trade-offs between food loss and waste reduction and GHG emissions Speaker: Jan Broeze

1. Analysing trade-offs
between food loss
and waste reduction
and GHG emissions
Jan Broeze, Bert Dijkink, Martijntje
Vollebregt, Toine Timmermans, Heike
Axmann, Xuezhen Guo

2. GHG impacts by supply chains:
direct emissions + FLW-related emissions
EU-FUSIONS (2015)
GHG emissions due to waste
management are not yet included
(composting, bio-energy production,
landfilling)

3. Global FLW-related GHG emissions ~ 2Gton/y
Data sources:
• Porter et al. (2016): FLW %, GHG emission factors
• FOASTAT (production volumes, trade)
(GHG emissions due to agricultural production + international transport,
excluding other post-harvest activities)

4. Data for Sub-Saharan Africa

5. 0
5
10
15
20
25
30
Bovine meat, 7C Bovine meat, 4C Cut lettuce, 7C Cut lettuce, 4C
GHGemissions(kgCO2-eq/kgproduct)
primary production PH activities and collection transp.
primary processing and packaging transport
DC storage and transport to retail outlet retail
Loss and Waste
Lowering FLW-related GHG emissions by
loss-reducing interventions? 2 examples
22
22.5
23
23.5
24
24.5
25
25.5
Bovine meat, 7C Bovine meat, 4C
GHGemissions(kgCO2-eq/kgproduct)
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.55
Cut lettuce, 7C Cut lettuce, 4C
GHGemissions(kgCO2-eq/kgproduct)

6. Example: tomato baskets vs. crates
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
Baskets Crates
CO2impact(kgCO2perkgintactptoductatmarket)
Comparison GHG impact for tomato supplied in crates
vs. baskets
Agricultural production Transport fuels
Impact of losses in transport
emissions due to crates
Agro-Chain Greenhouse
gas Emissions (ACGE)
calculator will be made
available on
https://ccafs.cgiar.org/

7. Estimating Food products climate impact:
Agricultural production + Post-harvest emissions + Losses
Agro-Chain Greenhouse gas Emissions (ACGE)
calculator will be made available on
https://ccafs.cgiar.org/

8. Data sources in current ACGE calculator

9. Adequate monitoring is essential
Self-reported interviews vs. Direct Measurements
Choice of data collection
method may largely affect
the outcomes
37%
39%
25%
34%
8% 8%
9%
9%
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
Benue Plateau Taraba average all
regions
Loss(in%)
Measured (% based on total paddy in field)
self-reported (% based on expected yield)

10. To conclude...
FLW preventing interventions may
contribute to GHG emission
reductions. Some won’t.
We need informed decision
taking
Quantitative analysis tools
are available
Increasing the set of primary
data would improve the
validity
Thank you!
jan.broeze@wur.nl