Ages old, but still quite clever. (Although it only works at night I suppose and they could've made a different point about renewable energy and powered the whole thing by solar or wind).
Much like this.
Although for a really creative use of billboards, nothing beats this.
Ways to get Green Thing:
Subscribe to our lovely newsletter >>
Watch our latest videos >>
Get Green Thing on iTunes >>
Read the top member stories >>
Read the latest from the Green Thing blog >>
Follow Green Thing on Twitter >>








