Explain why it is deemed better to use Sea freight rather than air

It would be rare to find a supplier who does not emit any form of pollution. However, part of ethical and responsible sourcing is to make effort to reduce impact of population on the planets. Pollution can be factory emission, Noise, smell, Transportation Development, waste disposal. Transportation is a major cause of pollution. The carbon dioxide emitted from vehicles contributes greatly to air contamination. Yet it is better to use sea freight rather than air because it has a smaller impact on the environment.