I found video on YouTube for model speed build. Playing on 0.25 speed produce an acceptable result with parts being used in each step. At the second part of the video instruction sheet is also visible (image has been rotated, compared to video):
The instructions for the "LEGO NXT Green City Challenge Activity 9594" seem to be on CDROM only.
Replacement disks are offered on bricklink for Green City Challenge Activity Pack and Mindstorms Education NXT Software 2.1
See this post here for another answer.