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With the 40th Earth Day celebration going on around the world, commentator Rosie Dempsey finds herself thinking about some old friends from childhood: trees.

Tread lightly... And, thanks for talking trees to: Henderson Urban Forester, Lisa Ortez; Las Vegas Arborist Dennis Schwartzel; Las Vegas Office of Planning, Flynn Fagg; Desert Studies Center Biologist Rob Fulton; UNCE Orchard, Fred Landau; University of Nevada Master Gardeners: Angela O'Callahan and Richard Liefred.

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