claim: Converting to these cleaner sources [ of energy ] may be somewhat costlier in the short term, but they could ultimately pay for themselves by heading off climate damages and reducing health problems associated with dirty air.
evidence: Efforts to reduce pollution from mobile sources includes primary regulation ( many developing countries have permissive regulations ),[ citation needed ] expanding regulation to new sources ( such as cruise and transport ships, farm equipment, and small gas-powered equipment such as string trimmers, chainsaws, and snowmobiles ), increased fuel efficiency ( such as through the use of hybrid vehicles ), conversion to cleaner fuels or conversion to electric vehicles.