Before you resurface and freshen up the macadam on the driveway to your house using coal-tar based sealcoats, you had better take note of new research that found those sealcoats are more toxic than anyone ever thought before now.
According to research done at Oregon State University,
sealcoats are polycyclic aromatic hydrocarbons, or PAHs, which are common products of any type of combustion, and have been shown to be toxic to birds, fish, amphibians, plants and mammals, including humans.
Studies done with zebrafish – an animal model that closely resembles human reaction to toxic chemicals – showed developmental toxicity to embryos.  [CJF emphasis]
Moreover, they found that PAHs in sealcoats were thirty times more toxic than common PAHS that previously were studies by the U.S. Geological Survey! Just imagine how many kids play basketball on those driveways.
However, there is a difference between sealants sold in geographic locations of the USA. Sealcoats sold in the western part of the USA are based on asphalt, which is less toxic than the coal-ash based sealcoats sold in the Midwest and eastern part of the country. Did you know that?
Here’s information every homeowner ought to know and consider when it comes to their driveway:
A 2011 report from the USGS outlined how PAH compounds from sealcoat products can find their way into soils, storm waters, ponds, streams, lakes, and even house dust, as the compounds are tracked by foot, abraded by car tires, washed by rain and volatilize into the air. They reported that the house dust in residences adjacent to pavement that had been treated with a coal tar-based sealcoat had PAH concentrations 25 times higher than those normally found in house dust.  [CJF emphasis]
The above should become the prime motivation for the practice of using house slippers inside your house, and leaving outside shoes parked in a tray inside the mud room, the garage, the front hallway, or somewhere everyone won’t be contaminating carpets, flooring infants and children play on, and indoor living space by the soles of everyone’s shoes. In my house, I have guest slippers for visitors and everyone knows to park their shoes right inside the front door.
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OSU researcher Staci Simonich offers this about their research:
Our study is consistent with previous findings made by the USGS. But we were able to study a much wider number of PAH compounds than they did. As a result, we found even higher levels of toxicity in coal-tar based sealcoats than has previously been suspected. 
If that be the case, then what are the toxic implications, plus ramifications, for human health from the suspected coal fly ash ingredient [2,3] that’s been thought to be in the mix sprayed as part of the sky graffiti laid down in the Solar Radiation Management  project overhead, colloquially called “chemtrails”?
Catherine J Frompovich (website) is a retired natural nutritionist who earned advanced degrees in Nutrition and Holistic Health Sciences, Certification in Orthomolecular Theory and Practice plus Paralegal Studies. Her work has been published in national and airline magazines since the early 1980s. Catherine authored numerous books on health issues along with co-authoring papers and monographs with physicians, nurses, and holistic healthcare professionals. She has been a consumer healthcare researcher 35 years and counting.
Catherine’s latest book, published October 4, 2013, is Vaccination Voodoo, What YOU Don’t Know About Vaccines, available on Amazon.com.
Her 2012 book A Cancer Answer, Holistic BREAST Cancer Management, A Guide to Effective & Non-Toxic Treatments, is available on Amazon.com and as a Kindle eBook.
Two of Catherine’s more recent books on Amazon.com are Our Chemical Lives And The Hijacking Of Our DNA, A Probe Into What’s Probably Making Us Sick (2009) and Lord, How Can I Make It Through Grieving My Loss, An Inspirational Guide Through the Grieving Process (2008)
Catherine’s NEW book: Eat To Beat Disease, Foods Medicinal Qualities ©2016 Catherine J Frompovich coming in Summer 2016