Columbus is letting down its residents and perpetuating a legacy of respiratory disease.

You probably aren’t watering or pruning the 75-foot oak or maple in the front yard, but mature trees aren’t maintenance free.

With spikes on his shoes, a helmet on his head, a rope on his harness, and a chainsaw on his belt, Ken Gragg starts to climb.

Oak wilt is a fungus that spreads through a tree's water system, causing it to wilt and die. The fungus was confirmed in the park on Oct. 6, and nearly 30 trees have been cut down. Nearly 30 oak trees ...