It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
tree aesthetic log crown logo emblem icon header symbol energy renewable globe human earth world humanity silhouettes group together population group of people power generation eco environment eco energy forward electricity production current forest leaves branches plant wood nature bark heat burn firewood
Page 2017 Free-images.com. All images are Public Domain