Original sentence: A goal of a local food system might be to minimize food transport distance.If food is processed, it may lose weight compared with unprocessed food.If it is processed by the consumer, more weight may be transported, though the trip from production to processing can be avoided.The amount of  fossil fuel consumed and CO2 emissions released in the atmosphere  of more local, unprocessed food vs.This issue is addressed by the field of regional science.To the extent it is processed nearer production, less weight is transported a longer distance.Transport costs must consider weight as well as distance.less local, processed food are thus ambiguous
Edited sentence: The first impact of a local food system would be to minimize food transport distance, from the farm to the comsumer house, hence reducing the amount of fossil fuel used up and CO2 emissions released in the atmosphere