As seen in USA Today, MSNBC, Dr. Oz, and the Chicago Tribune.


Are Hot Tar Cities Increasing Our Energy Bills While Decreasing Our Air Quality?

Research from the Lawrence Berkeley National Laboratory (LBL) indicates that they definitely are.  In partnership with the EPA, LBL has st...

Research from the Lawrence Berkeley National Laboratory (LBL) indicates that they definitely are.  In partnership with the EPA, LBL has studied the ability of urban materials to reflect light and absorb heat.  The above graphic is of Washington, D.C. and the hot colors indicate the heated locations.  Some of this research was co-authored by the current Secretary of Energy Steven Chu before taking his current post.
In general the phenomenon is referred to as the "urban heat island."  Interestingly, as asphalt ages and goes from black to gray, the ability of pavement to heat up decreases, as seen in the graph below.  That's just about the time when a new application of coal tar sealants is applied to return it to a heat absorbing, deep black color.
Just how different is coal tar sealant from others in its ability to heat up a city?  Some research in Austin by a PhD student (Mohan Rao) at Texas State University looked at the reflectivity of coal tar and asphalt-based sealants, but it did not cover the full spectrum of light that can produce heat as shown in the graph below.  The reflectivity is affected by a material's properties in both the visible and invisible spectrums.  I have noticed some asphalt-based sealants are as much as 10 to 15 degrees F cooler than coal tar, but that is expected to vary from product type (asphalt, coal tar, acrylic, or gilsonite) and with the numerous amounts of filler used to blacken a sealant.

So how significant is this heating?  Dr. Chu states that appropriate cooling of urban impervious surfaces, roofs and pavement, would be the equivalent of removing the carbon emissions of all of the cars in the world for 11 years!  In Austin, Texas just reducing the sealant color from "new asphalt black" to aged gray, there is a measurable reduction in energy consumption by the 500,000 households there. 

The cost of hotter cities is not just in the electric bill either.  It also increases the production of lung-damaging ozone, which in turn can cost not only health care and productivity costs, but also compliance costs and jobs.

As you can see below the pavement percentage of a city is different across the US, but it is about double the surface area of rooftops.  With the frequency of sealant application much more often than roof replacement, doesn't it make sense to know which non-toxic products reduce our urban pavement furnaces?



Stay informed...Get FREE updates on new coal tar bans!

* indicates required

Google Search of this Site


2016,49,ABC's,8,Action,53,airport,3,alternatives,6,Althoff,1,AMA,1,American Coating Association,2,Anacostia,1,Andover,1,applicator,1,APWA,1,ASCE,1,Asphalt Institute,1,ASTM,1,Austin,27,Austin Chronicle,1,ban,135,bans,5,Baylor,9,benzo[a]pyrene,1,Boca Raton,1,Boone,3,Burke,1,California,11,CalTrans,1,Canada,6,cancer,23,Cheh,1,Chesapeake Bay,1,Chicago,7,Chicago Sun Times,1,Chicago Tribune,7,china,1,Cleveland,2,coffee-tea test,3,Congress,6,Connecticut,2,consumer,1,cost,11,costs,1,Dallas,1,Dane County,1,Data Quality,1,Daughtry,4,DC,1,DDT,1,Deep Water Horizon,1,Delaware,1,Department of Defense,1,Department of Interior,2,District of Columbia,7,Doggett,17,DuPage River Salt Creek,2,Ed Burke,1,Edwards Aquifer Authority,3,Ellison,2,Emancipation,1,enforcement,6,environmental justice,1,EPA,31,EU,1,FAA,6,FAQ,14,field test,1,fish kill,3,Florida,2,Frockt,2,German Federation,1,Gowanus,2,Great Lakes,4,Gregoire,1,Hansen,4,Hawthorne,2,health,62,Hoffman Estates,1,Home Depot,1,Huffman,7,IARC,1,Illinois,27,Indiana,2,industry,68,Jeffords,1,Kansas,3,Keating,2,Lindsay,2,Long Island,1,Lowes,1,Mackerer,1,Madison,1,Maine,9,map,2,Maryland,8,Massachusetts,3,McDermott,1,McHenry,1,McHenry County,2,MCPA,1,Men's Health,1,Michigan,9,Milwaukee,1,Minneapolis,1,Minnesota,32,Mississippi River,2,Missouri,6,Montgomery County,3,Morgan State,1,MPCA,23,MS4,1,MSDS,1,MSNBC,2,national pavement contractors association,1,National Research Council,1,New Hampshire,4,New York,14,New York Academy of Sciences,1,Niezgodski,1,NOAA,1,North Carolina,3,npca,1,NPDES,1,Ohio,2,Oklahoma,1,OSHA,1,PCTC,2,Pennsylvania,1,Pets,1,Physicians for Social Responsibility,4,price comparison,6,Quigley,2,Quinoline,1,Reader's Digest,2,Regs,6,relative potency factor,1,Republican,1,Rice,1,Rocky River,1,Rodale,2,Rosenthal,3,RT-12,1,San Antonio,7,San Diego,1,Scalze,3,schools,8,Science,57,shotblasting,3,Sierra Club,1,Sisisky,2,Slavins,1,Smoking,2,South Barrington,1,South Carolina,1,Springfield,7,Stormwater Magazine,1,Suffolk,2,Suffolk County,3,Texas,4,The Doctors TV Show,1,Today Show,1,Tom Bashara,3,Toronto,2,tribute,1,TSCA,2,Twitter,9,UConn,2,University of Michigan,1,US Department of Health and Human Services,1,USA TODAY,3,USGS,43,Video,18,Wall Street Journal,1,Walmart,1,Warner,1,Washington,8,Washington Environmental Council,2,Washington State University,1,Watauga Riverkeepers,1,WEF,3,wetland regulations,1,Wieckowski,1,williams,2,Winfield,2,Wisconsin,3,z2014,31,z2014 Summary,14,
Coal Tar Free America: Are Hot Tar Cities Increasing Our Energy Bills While Decreasing Our Air Quality?
Are Hot Tar Cities Increasing Our Energy Bills While Decreasing Our Air Quality?
Coal Tar Free America
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy