The Washington Supreme Court will hear arguments Tuesday on whether timber owners and loggers can be sued if trees left standing to benefit the environment fall and cause damage. The main defendant, the Department of Natural Resources, argues state law grants forestland owners, including itself, immunity because trees that fall naturally along creeks help fish and water. A man grievously injured by a falling tree argues DNR forfeited that immunity with a poorly planned timber harvest that endangered public safety. The Washington Farm Bureau and timber industry are asking the court to side with DNR. Without immunity, landowners will be encouraged to cut every tree possible, according to their friend-of-the court brief. …The case stems from a timber harvest on DNR land in Snohomish County in 2018. …The logging operation was wrapping up when a 120-foot tall Douglas fir uprooted in a windstorm and crashed on a Ford Explorer.