BOSTON (AP) — A nearly year-long effort by New England’s governors to collectively address the region’s high energy costs is on hold now that some have voiced concerns about the initiative’s dual strategy of importing Canadian hydropower and investing in new natural gas pipelines.

Energy officials from the six states have been developing a proposal that would impose federal tariffs on electric ratepayers to finance the energy infrastructure projects. But the group — the New England States Committee on Electricity — has decided to hold off on the process for at least a month.