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Flower power.(Special report)

Kevin Clemmer and Derek Smith's neon orange safety vests aren't the only specks of color along North Carolina's highways. A vibrant sea of wildflowers also catches the eyes of drivers whizzing by.

Clemmer and Smith work for North Carolina DOT's (NCDOT) Roadside Environmental Unit, which protects and controls the hundreds of species of plants and flowers lining North Carolina's roadsides. The unit is extremely adept at managing the vast array of plants in the state's three major climate zones--coastal, piedmont, and mountain--which contain multiple cool- and warm-season grass species. The soil is sandy in the state's eastern coastal areas and clay in its mountainous ...

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