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That 's a strength of ours , and we're always working on enhancements . This is a disincentive to investment in mining , a disincentive in coal , the lowest cost form of electricity generation in America . " 4 This is a notion soundly rejected by nearly every provincial and federal government in Canada , as well as the Supreme Court in the more recent Libman case ( see below ) , all of which recognize the importance of party and candidate spending limits . This is a disincentive to open new mines .