Texas sales tax is normally due whenever you sell tangible personal property. This includes clothing, shoes, CDs, DVDs, books, furniture, bicycles, toys, and other personal items typically sold in garage/yard sales.
Using National Oceanic and Atmospheric Administrative Data, it is possible to do a ranking of Texas cities based on annual average particulate matter concentrations (in micrograms per cubic meter). Doing so reveals that many West Texas cities are represented on the list.