Veteran Canadian journalist Don Gillmor has an unusual and personal perspective on Canada’s oil and gas industry. He worked in the Alberta oilpatch for several summers in the 1970s, getting an intimate view of the business as the money poured in and transformed the province.

As the future of the nation’s oil and gas is debated in a federal election campaign, Gillmor’s new book “On Oil” looks back on the industry’s past and reminds us that while the environmental cost was less considered then, it was sometimes hard to miss. Alarm bells were being sounded, mostly unheeded, for a long time.