SALT LAKE CITY (AP) — A federal plan to cut pollution blamed for global warming by 2030 is winning cheers from environmental advocates, but a key state official says the plan is “bold and aggressive” and questions whether it can be executed.

The rule would curb national carbon dioxide emissions from power plants by almost a third over the next decade in a half. It would require Utah, which relies on coal for 80 percent of its electricity, to cut coal-generated emissions by nearly as much.