The rule of thumb I was taught many years ago in operations management class was that shipborne cargo freight, on a TEU basis, uses less fuel to get from Hong Kong to Los Angeles as it did to deliver that freight to the store in North America. It’s 100x less impactful in terms of CO2 output as trucking.
Sulfate emissions.
Which are bad, but are not CO2 emissions.
The entire shipping industry is a small fraction of the US’s automobile emissions.
The rule of thumb I was taught many years ago in operations management class was that shipborne cargo freight, on a TEU basis, uses less fuel to get from Hong Kong to Los Angeles as it did to deliver that freight to the store in North America. It’s 100x less impactful in terms of CO2 output as trucking.
https://climate.mit.edu/explainers/freight-transportation