With ropes, a harness, a hammock and a bucket pulley system, masked activists in Seattle have taken residence in the branches of an old, thick cedar tree to prevent it from being cut down to make way for new homes. The protest on a private lot is the latest episode highlighting tensions behind tree policy in Seattle as climate change increases temperatures and urban canopy decreases. The Western red cedar, dubbed “Luma,” is about 80 feet (24.4 meters) tall, with two trunks that are each about 4 feet (1.2 meters) in diameter.