MINNEAPOLIS — Battles over climate change and oil pipelines come to a head on three fronts in Minnesota this week.

Environmental groups have high hopes for a “Tar Sands Resistance March” to the State Capitol Saturday.

They want to keep Canadian crude in the ground instead of piping it across northern Minnesota via an expanded Alberta Clipper pipeline. Organizers including the Sierra Club and 350.org, say they expect thousands of people to participate.