Answer:
a range of more flexible, market-oriented pollution control policies
Step-by-step explanation:
While the traditional approach of U.S. government policies for environmental protection has had some level of success, some economists are proposing a change to "a range of more flexible, market-oriented pollution control policies."
The above is based on the fact that the traditional approach of the government on environmental pollution only focuses on the governmental limits on how much of each pollutant could be emitted.
However, economists believed that there could be more flexible, market-oriented pollution control policies that would cater to both marginal benefits and the potential marginal costs of the firms involved and the country at large.