logo shows interconnectedness, light comes from within (here the earth), part of the design incorporates leaf shapes (the living earth). Green for sustainable earth products and blue (water) and white light (solar and since it seems to come from within earth could also equal geothermal)
I had one other design (a combination of the two i have already entered (#81 and #82), but I accidentally loaded it to a different contest (it was late) and didn't find my error until this morning (by which time the contest was already closed). If you have a desire to see it, you could put my current design (temporarily) in first place since only people in first place can continue to upload to a contest once closed. Then let me know by private message to upload that design. Once uploaded, you could switch back to another design for first if you wish. I only bring this up because the one design is placed third and it is a related design. (alternatively since i uploaded it accidentally to direct innovations contest (and have since marked it withdrawn)--I could temporarily reinstate it and you could see it there as entry #57. Then you could decide if it is something you would even consider before you did any of the above. But, again, you would have to let me know you were going to check it out, so i could temporarily reinstate it.)
If you have no desire to see that design (which is perfectly okay)--please ignore.