I´m conducting a research where I need to estimate carbon emissions for the transportation of wood products shipped overseas (ocean and air). Thus, I´m looking for information on carbon emission factors for international ocean and air shipping. Furthermore, since wood products are often produced in rural areas, also local trucking carbon emissions are important. I´m looking for information on this by country or world region. Any body who has done something similar could provide some good places to start the search. Thank you!