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From Wikipedia: "Most utility poles are made of wood, pressure-treated with some type of preservative for protection against rot, fungi and insects. 

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Southern yellow pine is the most widely used species in the United States; however, many species of long straight trees are used to make utility poles, including Douglas firjack pinelodgepole pinewestern red cedar, and Pacific silver fir."

PORT ORFORD CEDAR
BLACK PINE
BLUE SPRUCE
JAPANESE PINE
WESTERN HEMLOCK
STONE PINE