Note: Permission embedded in file, and also made explicit on the Dow.com source website. As of January 29, 2016, the website included the following text: "The downloadable, hi-res photos on this page are released into the Creative Commons Attribution-ShareAlike 4.0 International License by Dow."
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/.