Can YOU please stop killing people? And I suggest that YOU stop being a drug mule.
(Please address that)
Systemic problems are seldom systemic, but agendas driven by the ruling class. Taxation and regulation have created the monster that USA (and other places) is, for instance in the suburban crawl, unlivable cities, and long distance shipping/transport. The ruling class bought off by the oil industry to ensure the growth of oil consumption over the last 100+ years.
@MrEff
Yes, that gives you a pretty good number. Some overhead for the trucking will fall on our plates too, which is much harder to figure out, since it depends on your consumption patterns.