| http://www.w3.org/ns/prov#value | - ??), a certified tree-climber, who earned his tree-climbing certification in Atlanta, Georgia in the US.Recreational tree-climbing is not competitive; rather, it is reflective and personal, Su said.We do not climb trees freehand but with gear like ropes, helmets, harnesses, gloves and carabiners, he said.Su emphasized that safety is a top priority and said tree-climbing is a good pastime for k
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