Final answer:
The number of temporary permits a dealer may issue for each roadworthy vehicle sold may be limited to encourage emissions reduction.
Step-by-step explanation:
The number of temporary permits a dealer may issue for each roadworthy vehicle sold may vary depending on the specific regulations in place.
However, when considering the conditions of reducing total emissions over time and allowing firms to buy and sell marketable permits, the number of permits issued may be limited to encourage emissions reduction.
For example, if the emissions limit decreases each year, the dealer may be restricted to issuing fewer permits for each vehicle sold in order to align with the decreasing emission levels.