There is much community concern about global warming and an expectation we will all do our bit to reduce greenhouse gas emissions.
So why did the Australian Rail Track Corporation (ARTC) decide to transfer its annual requirement for 400,000 railway sleepers from timber to concrete?
According to Mark Poynter* this will result in an extra 190,000 tonnes of carbon dioxide emissions per year that could otherwise have been negated by carbon sequestered in forest regrowth and saved by avoiding concrete manufacture.
At the recent AEF conference Poynter said:
“To put this in perspective, the Victorian government has firmly embraced windfarms as part of its renewable energy strategy. They are estimated to be saving 250,000 tonnes of greenhouse gas emissions per year. Some 75 percent of this has been negated by the ARTC preference for concrete sleepers.”
According to Minister Warren Truss back in April:
“This contract will provide a massive and ongoing boost to the Australian concrete and cement industry … the concrete sleepers can carry heavier loads and incur less maintenance costs. They provide a more consistent, stable and reliable track and have a longer life, with less degradation than timber, he said.
No mention of the greenhouse cost?
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* Mark Poynter is a member of the Institute of Foresters of Australia, he spoke at the recent AEF conference as part of a panel on ‘Saving Australia’s Forests’. ABC Online mentioned the conference last Friday, and in particular the AEF award to timber company Gunns Ltd.
Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation.