Table 8 CO2 emissions for producing 1 m2 of lettuce in System-I and System-II.
CO2 emissions (kgCO2eq/m2) | Share (%) | |||
|---|---|---|---|---|
System-I | System-II | System-I | System-II | |
Electricity for the treatment pump unit | 0.0077 | 0.007 | 0.5 | 9.00 |
Steel | 0.0083 | 0.008 | 0.5 | 9.7 |
PE | 0.0024 | 0.0024 | 0.1 | 2.8 |
PVC | 0.040 | 0.040 | 2.6 | 46.9 |
Phosphorous | 0.0023 | 0.0023 | 0.1 | 2.7 |
Potassium | 0.0068 | 0.0068 | 0.4 | 7.9 |
Nitrogen | 0.017 | 0.017 | 1.1 | 20.8 |
Electricity/PV for NFT pump | 1.45 | 0 | 94.4 | 0 |
Total | 1.5438 | 0.0860 | 100 | 100 |
