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'Green' Roofs Could Help Put Lid On Global Warming

Date:
September 26, 2009
Source:
American Chemical Society
Summary:
"Green" roofs, those increasingly popular urban rooftops covered with plants, could help fight global warming, scientists in Michigan are reporting. Their study is the first of its kind to examine the ability of green roofs to sequester carbon which may impact climate change.

"Green" roofs, such as the one above, could fight climate change, scientists report.
Credit: Image courtesy of Wikimedia Commons

"Green" roofs, those increasingly popular urban rooftops covered with plants, could help fight global warming, scientists in Michigan are reporting. The scientists found that replacing traditional roofing materials in an urban area the size of Detroit, with a population of about one-million, with green would be equivalent to eliminating a year's worth of carbon dioxide emitted by 10,000 mid-sized SUVs and trucks.

Their study, the first of its kind to examine the ability of green roofs to sequester carbon which may impact climate change, is scheduled for the Oct. 1 issue of ACS' Environmental Science & Technology, a semi-monthly journal.

Kristin Getter and colleagues point out in the new study that green roofs are multi-functional. They reduce heating and air conditioning costs, for instance, and retain and detain stormwater. Researchers knew that green roofs also absorb carbon dioxide, a major greenhouse gas that contributes to global warming, but nobody had measured the impact until now.

The scientists measured carbon levels in plant and soil samples collected from 13 green roofs in Michigan and Maryland over a two-year period. They found that green roofing an urban area of about one million people would capture more than 55,000 tons of carbon, the scientists say. That's an amount "similar to removing more than 10,000 mid-sized SUV or trucks off the road a year," the article notes.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Getter et al. Carbon Sequestration Potential of Extensive Green Roofs. Environmental Science & Technology, 2009; 090825125115043 DOI: 10.1021/es901539x

Cite This Page:

American Chemical Society. "'Green' Roofs Could Help Put Lid On Global Warming." ScienceDaily. ScienceDaily, 26 September 2009. <www.sciencedaily.com/releases/2009/09/090923133000.htm>.
American Chemical Society. (2009, September 26). 'Green' Roofs Could Help Put Lid On Global Warming. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2009/09/090923133000.htm
American Chemical Society. "'Green' Roofs Could Help Put Lid On Global Warming." ScienceDaily. www.sciencedaily.com/releases/2009/09/090923133000.htm (accessed September 18, 2014).

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