Provide incentives to trade in old cars or light duty trucks with low fuel efficiency and high emissions and buy new vehicles with higher efficiency and lower emissions; also called scrappage or vehicle early retirement programs
Provide sterile injection equipment and often other treatment and referral services to people who inject drugs; also called needle or syringe exchange programs and needle syringe programs
Restrict full contact between youth football players via limits to the number of contact practices, head hits per player, delay tackling until a certain age, etc.