Canwest News Service: Environmentalists are concerned the federal government’s “clean energy dialogue” with the United States is too focused on technology that won’t have much impact on cleaning up Alberta’s oilsands. But the technology for carbon capture and storage, the centrepiece of the agreement, could be significant for reducing greenhouse gas emissions in the coal industry — often overshadowed in Canada by debate about the oilsands. Environment Minister Jim Prentice is in Washington Monday …