food – US: Does canned pineapple produce more CO2 per calorie than fresh? – GWC Mag

It all depends on the energy source used by canneries.

During the canning process the pineapples have have to be washed, peeled, cut up, most likely cooked, the cans/containers sterilized, sealed, labelled and sent to storage for transportation to consumers.

If the energy used to do all of of this is derived from renewables then the amount of CO₂ will be close to zero. However, most canneries purchase their electricity from a supplier and in most situations that electricity will have been generated by CO₂ producing power plants.

To answer your question, until all canneries use renewable sources of energy, the products they produce will have a higher carbon footprint than fresh versions of the product.