State lawmakers will review Wisconsin’s new mercury emission rules this week.

They call for Wisconsin utilities to slash emissions by 90% during the next decade.

The state says the limits mean cleaner air.

Environmentalists say the rule is too weak.

Businesses are also complaining; they say utilities will have to spend tens of millions of dollars to comply and that will drive up their electric bills.

The Republican-controlled Assembly Natural Resources Committee will hold a public hearing Wednesday on the rules.