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:
background nature environment environmental science environmentalscience forest trees fog mist haze cloudy overcast outdoor green evergreen public domain publicdomain tree plant Public Domain Dedication CC Source Public Domain Dedication CC Source
Page 2017 Free-images.com. All images are Public Domain