Industrial air pollutants, such as organochlorines and heavy metals, are carried to the arctic on air currents from populated areas. Lichens are a dominant life form on the tundra, and they are particularly vulnerable to air pollution because they lack roots and get the majority of their resources from the air. Because of this, lichens have historically been used as air pollution indicators.
Hurst is a city in Tarrant County, Texas, United States. Hurst is one of the Mid-Cities between Fort Worth and Dallas. it is local a suburb of Fort Worth. The city was founded by William Letchworth Hurst. As of the 2010 census, it had a population of 37,337.
Rockwall County is part of the Dallas-Fort Worth-Arlington, TX Metropolitan Statistical Area. It was one of the top twenty-five fastest growing counties in the U.S. in 2010.Rockwall County is currently listed as the 6th wealthiest Texas county in Texas locations by per capita income.Its cities include Rockwall, Royse City, Fate, McClendon-Chisolm, Mobile City, and a part of Rowlett.ockwall County is part of the Dallas-Fort Worth-Arlington, TX Metropolitan Statistical Area. It was one of the top twenty-five fastest growing counties in the U.S. in 2010.