MINNEAPOLIS (AP) — The Minnesota Court of Appeals has heard arguments over Enbridge Energy's Line 3 replacement project in northern Minnesota, which opponents are calling unnecessary due to an eventual decline in the demand for oil.

The Calgary, Alberta-based company broke ground on the replacement pipeline in December after receiving a construction stormwater permit from the Minnesota Pollution Control Agency.

The Minnesota Court of Appeals heard arguments Tuesday and is expected to issue a decision by June.

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