This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
WildFireAreaNHorkenNHrkFPISY. Prepared wood sample from Wild fire area Hrken Ljusnarsberg Sweden Growth rings from and the very beginning of years early wood The pine was cored from bark to bark with Haglf's mm mm increment borer The pine was damaged by the fire in high summer midsummer or early July One side died but the other