Polar bear shot from
http://globalwarming.house.gov/impactzones/arctic

the three images from space I obtained from 

Brian Campbell (brian.a.campbell@nasa.gov)

through 

Jay Zwally (zwally@icesat2.gsfc.nasa.gov)

On the traffic image - I obtained it through
Google image search using "traffic jam"
but when I went back again to find it I searched
through about 70 pages and was unable to find the 
source again.

The wind turbine shot is from
http://www.ourworldfoundation.org.uk/sol-nof.htm