> The following table shows the amount of CO2 (in grams) emitted per metric ton of freight and per km of transportation Something shipped on truck from nearby

> The following table shows the amount of CO2 (in grams) emitted per metric ton of freight and per km of transportation Something shipped on truck from nearby will be doing a lot less kilometers total and produce much less total emissions. Usually shipping something around the world will use those less efficient transport methods to complete the trip anyway, so it's an addition and not a replacement.