|Product||CO2e / kg||Studies|
From personal experience, one serving of dried pasta is about 100 grams . Some sources say that a serving is just 57 grams , but this might refer to the case when pasta is served as a first course, as is common in Italian restaurants, rather than as a main course. With an emission factor of ~1.5 kg CO2e / kg, these 100 grams amount to about 0.15 kg CO2e / portion.
Pasta approximately doubles in weight when cooked al dente , so a serving of cooked pasta is about 200 grams.
 https://delishably.com/grains/How-much-pasta-per-serve-tips-to-make-sure-you-get-it-right  https://www.barilla.com/en-ca/help/measuring-pasta  https://www.quora.com/How-do-I-measure-100g-of-cooked-pasta-in-dry-pasta-How-much-dry-pasta-do-I-need-so-that-when-its-cooked-it-weighs-100-grams
|Source||Notes||CO2e||Country origin||Country consumption||Weight|
|RISE Open access list 1.7||Per kg unboiled spagetti||
|RIVM Database Milieubelasting Voedingsmiddelen||Pasta||
|Environmental impact of plant-based foods||All identified studies considered relevant for the Swedish market.. Studies: 4 (2 SW)||
|Den store klimadatabase||Pasta, Agriculture: 0.52, iLUC: 0.04, Food processing: 0.25, Packaging: 0.23, Transport: 0.68||
|Greenhouse gas emissions of realistic dietary choices in Denmark: the carbon footprint and nutritional value of dairy products||Table 1; including waste; excluding waste: 1.93||