What are PAHs in the environment?

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic compounds. These chemicals come from both natural and man-made sources. Man-made sources of PAHs in the environment include the incomplete burning of organic materials (e.g., coal, oil, gas, wood, garbage); vehicle exhaust; asphalt; coal-tar and coal-tar based sealcoats; creosote; and cigarette and tobacco smoke. (Source: epa.gov)

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1. What is coal-tar sealcoat?
2. What are PAHs in the environment?
3. What state legislative action has been taken addressing PAHs from coal-tar sealcoat?
4. What City action prohibits high levels of PAH?
5. I am a resident. What action do I need to take?
6. I am a contractor. What action do I need to take?
7. I am a business owner. What action do I need to take?
8. What are some alternatives to coal-tar sealant?
9. Does this mean that I cannot replace my driveway with asphalt?
10. Does this mean that I cannot reseal my own driveway?