Wind turbine: Source: Flickr/Author: Argonne_National_Laboratory/License: Creative Commons Attribution-non-commercial-share-alike. www.flickr.com35734278@N05/8004201383c
Marsh: Source: Flickr/Author: Baban_Shyam/License: Creative Commons Attribution-non-commercial-share-alike. www.flickr.com/39079181@N02/8046428275
Solar Panel: Source: Source: Flickr/Author: Argonne_National_Laboratory/License: Creative Commons Attribution-non-commercial-share-alike. www.flickr.com/35734278@N05/8004138824/
Chimney: Source: Flickr/Author: BiaAy/License: Attribution-non-commercial-share-alike.www.flickr.com//32821769@N07/4406416157/
RIO+20: Source: Flickr/Author: CGIAR_Climate/License: Creative Commons Attribution-non-commercial-share-alike. http://www.flickr.com/photos/cgiarclimate/7415547236/sizes/m/in/photostream/
Farming: Source: Flickr/Author: Walmart_stores/License: Creative Commons Attribution 2.0 generic. http://www.flickr.com/photos/walmartcorporate/5304306829/sizes/m/in/photostream/
Corn: Source: Flickr/Author: Alternative_heat/License: Creative Commons Attribution 2.0 generic. http://www.flickr.com/photos/alternative_heat/6238034426/sizes/m/in/photostream/
Oil rig: Source: Openlearn//License: Creative Commons Attribution-Non-Commercial-ShareAlike 2.0 Licence. http://openlearn.open.ac.uk/mod/oucontent/view.php?id=397916&section=1
Car fuel: Source: Openlearn/License: Creative Commons Attribution-Non-Commercial-ShareAlike 2.0 Licence. http://openlearn.open.ac.uk/mod/oucontent/view.php?id=397916&section=1
Cityscape: Source: Flickr/Author: Chooyutshing/License: Attribution-Non-Commercial-ShareAlike 2.0 Generic. http://www.flickr.com/photos/25802865@N08/3020868752/sizes/m/in/set-72157609650988127/
Glass building: Source: Flickr/Author: Phillip Wong/License: Creative Commons Attribution-non-commercial-share-alike. http://www.flickr.com/photos/phwconz/5842352154/sizes/m/in/photostream/
Corporate Identity: Source: Flickr/Author: ntr23/License: Creative Commons Attribution-non-commercial-share-alike. http://www.flickr.com/photos/ntr23/187226087/sizes/m/in/photostream/