Half of global car exhaust produced by US vehicles
Americans represent 5% of the world’s population but drive almost a third of its cars, which in turn account for nearly half the carbon dioxide pumped out of exhaust pipes into the atmosphere each year, according to a report.
US cars play a disproportionate role in global warming because they are less fuel efficient than passenger vehicles used elsewhere in the world, emitting 15% more carbon dioxide, and because they are driven further across America’s wide open spaces, said the report by the Environmental Defence watchdog group.
guardian.co.uk