Home About CAC News Releases Diverting Waste from the Landfill: Alternative Energy Sources Prove Beneficial in Reducing GHGs

Diverting Waste from the Landfill: Alternative Energy Sources Prove Beneficial in Reducing GHGs

LONDON, ON, September 7, 2011 – A study released today by an independent research centre reveals using household garbage, tires and even plastic to manufacture cement would produce fewer greenhouse gases and reduce the amount of waste sent to landfill than the fossil fuels currently used.

Conducted by the Network for Business Sustainability, a non-profit research group based at the Richard Ivey School of Business, the study reviewed the last 10 years of academic and industry research.

“From the reviewed documents, we found it could be better to burn municipal solid waste rather than burning coal to manufacture cement,” says Rosa Maria Dangelico, a post-doctoral fellow at Politecnico di Bari in Italy and one of the study’s co-authors. “Doing so could lead to some environmental benefits, compared to the use of fossil fuels, such as reduction in the quantity of waste going to landfill and decrease of air emissions responsible of global warming, such as carbon dioxide.”

The findings confirm what environmentally progressive countries like Germany, France and Belgium have known for years. Cement plants in those countries get a third of their fuel from sewage sludge, waste wood, used tires, and household and industrial refuse.

Public resistance to alternative fuels typically focuses on the toxins released and their negative impacts on human health. While it’s true that incinerating car tires and plastic products releases harmful pollutants into the air, cement kilns burn at such high temperatures – up to 1,450 degrees Celsius – that most of toxins are burnt before they can be released into the air. Also, any residual compounds are often absorbed into the cement itself.

“It’s counter-intuitive that burning waste products such as used tires could somehow be better for the environment or human health than our current model,” says Tima Bansal, a professor of management at the Richard Ivey School of Business and Executive Director of NBS. “But it speaks to the importance of academic research in shaping decision-making. Environmental issues can be easily overwhelmed by rhetoric, so our business leaders and policy-makers need objective, reliable research to inform energy and health policies.”

This research study is an example of a “systematic review”, one of the most rigorous forms of academic analysis. With their origins in medical research, systematic reviews synthesize all the available research on a topic. They distill the findings using transparent keyword searches and document the process so subsequent research teams can replicate the results. The Network for Business Sustainability has conducted six such systematic reviews to date.

The research was supported in part by the Cement Association of Canada (CAC). The study was subjected to a double-blind review by academic and industry experts in alternative fuels and cement. The CAC and its member companies actively support and are committed to ongoing research of alternative fuel sources in the cement manufacturing process in order to reduce greenhouse gases (GHG) and reducing its carbon footprint.

Alternative Energy Sources in Cement Manufacturing: A Systematic Review of the Body of Knowledge. (139 pages)

Alternative Energy Sources in Cement Manufacturing: Executive Summary (2 pages)

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The Network for Business Sustainability is a Canadian not-for-profit organization that connects thousands of researchers and business leaders worldwide, with the goal of creating new, sustainable business models for the 21st century. NBS receives funding from the Social Sciences and Humanities Research Council of Canada, the Richard Ivey School of Business at The University of Western Ontario, the Université du Québec à Montréal (UQAM), and industry partners. www.nbs.net

The Cement Association of Canada (CAC) is the voice of Canada’s cement industry, a strategic contributor to the country’s economy and infrastructure. The CAC and its members are committed to being part of the climate-change solution through the environmentally responsible manufacturing of cement and the provision of cement and concrete products that contribute to sustainable construction of homes, buildings and roadways. CAC’s members are CalPortland, Ciment Québec, ESSROC Italcementi Group, Federal White Cement Ltd., Holcim Canada, Lafarge Canada, Lehigh Hanson Canada and St Marys Cement Group — companies whose parent corporations belong to the World Business Council for Sustainable Development – Cement Sustainability Initiative. For more information, please visit www.cement.ca.

NBS Leadership Council Members

  • BC Hydro
  • Canadian Pacific Railway Limited
  • Environment Canada
  • Home Depot of Canada Inc.
  • Holcim (Canada) Inc.
  • International Institute for Sustainable Development
  • Industry Canada
  • LoyaltyOne, Inc.
  • Pembina Institute
  • Research In Motion
  • SAP Canada Inc.
  • Suncor Energy Inc.
  • TD Bank Group
  • Teck Resources Limited
  • TELUS Corporation
  • Tembec Inc.
  • Tim Hortons Inc.
  • Unilever Canada Inc.

For more information, please contact Carol Kehoe, Communications Director, NBS at 519.661.2111 x88107 or This e-mail address is being protected from spambots. You need JavaScript enabled to view it