If we had pick and pack robots and delivery drones that were powered by solar fields and alternative energy, I would say that’s about as close to carbon neutral logistics as we can get. Trucking and freight are still exorbitantly polluting but the heavy “last mile” pollution problem would be traded with increased overhead air traffic. The reality is: a self driving car with a delivery robot is probably going to be our answer in 2040.
Simple example would be to reduce the scale up and install cost of clean energy.