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:
power station chimney metal industry power station industrial energy pollution plant sky environment factory fuel steam smoke coal electric electricity building ecology technology generator gas electrical pollute climate warming heat cooling thermal global smog environmental vapor pipe nuclear dioxide fumes air chemical toxic exhaust
Page 2017 Free-images.com. All images are Public Domain