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Cost-Benefit Analysis of Smog-Eating Tiles. Ben Bahlenhorst Zheng Fu Joe Hill Ian Laird Long Nguyen Binh Phan. Introduction. Smog-Eating Tiles: Compostable tiles created by Boral that absorb smog in areas that harbor large quantities of inhabitants.

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cost benefit analysis of smog eating tiles

Cost-Benefit Analysis of Smog-Eating Tiles

Ben Bahlenhorst

Zheng Fu

Joe Hill

Ian Laird

Long Nguyen


  • Smog-Eating Tiles:Compostable tiles created by Boral that absorb smog in areas that harbor large quantities of inhabitants
  • Purpose:inform the reader about the costs and benefits of smog-eating tiles in areas that have high levels of smog
  • Benefits the environment, and human health in densely populated metropolises
how they work
How They Work
  • Tiles are coated with titanium dioxide
  • In sunlight, the titanium dioxide reacts with the nitrogen oxides, which breaks them down into calcium nitrate:

TiO2 + NOx + Sunlight = Ca(NO3)2

  • Calcium nitrates do not harm human health. These substance are left on tiles, and washed off when it rains
  • Initial costs average about 25% more than traditional tiles
  • Installation costs do not differ from traditional tiles
  • Removal costs are also the same, but transportation to a recycling facility add additional costs
  • Local government should provide tax cuts to those who purchase smog eating roofs
  • A tax on traditional roof tiles and maintenance will pay for the tax incentive
  • This makes smog eating tiles the cheaper option
  • Reduced smog pollution in densely populated areas
  • Nitrates: great for surrounding plant life
  • Keeps homes warm in the winter and cool in the summer
  • Human health will increase considerably
  • Compostable materials are durable
  • Tiles last for an average of 25 years before they need to be replaced
  • Half as long as traditional tile life
  • Need to be replaced just as

wood or asphalt

  • However, concrete tiles are replaced less often
  • They will not clog landfills like other roofing materials
  • Tiles can be recycled and made into new tiles, or infrastructure
  • They benefit the environment
  • Benefits outweigh the costs
  • Smog level reduction creates a healthier environment and inhabitants
  • Tiles reduce home heating and cooling costs
  • Recyclable tiles mitigate the amount of landfill waste
works cited
Works Cited
  • Benefits of concrete roofing tile recycling. (2008, October 20). Retrieved from
  • Emission Standards Reference Guide. Retrieved from

  • Levinson, R. (2007). Cooler tile-roofed buildings with near-infrared-reflective non-white coatings. Building and Environment, 42(7), doi:
  • Palmer, J. (2011, November 12). 'smog-eating' material breaking into the big time. Retrieved from
  • Peters, J. (2011, February 1). Los angeles homes going green with smog-eating roof tiles. Retrieved from
  • Renowden, J. (2012, July 19). Smog-eating tile: A real-world product for reducing the harmful health effects of contaminated air. Retrieved from
  • Renowden, J. (2011, July 12). Smog eating tile with boralpure™ technology. Retrieved from
  • Titanium dioxide used to reduce no levels in. (2011, April 1). Retrieved from
  • Verwymeren, A. (2011, September 12). Smog-eating tiles may make pollution a thing of the past. Retrieved from
  • What is photocatalyst. (2012). Retrieved from