PORTLAND — Former Maine independent gubernatorial candidate Eliot Cutler is joining a coalition that’s calling on Congress to protect the Clean Air Act.

The coalition is critical of a proposal by West Virginia Sen. Jay Rockefeller to delay for two years Environmental Protection Agency regulation of greenhouse gases, as well as another effort to delay the EPA’s plan to revisit ground-level ozone standards. Critics say the efforts would weaken the Clean Air Act.

Cutler, a lawyer, helped craft the 1970 Clean Air Act extension while working for Sen. Edmund Muskie of Maine.

Celebrating the 40th anniversary, Cutler is joining a coalition of environmental groups at rallies today in Bangor and Portland.