99% of people are just there to get out their nut and see their favourite bands. They are aren't claiming to be environmentally-friendly. However the organisers wanted it to be as it is cheaper on clean up for them.
Watched it and loved it. Made me want to take a shedload of class As and jump around like a loon.
The fact they look like a couple of the dads on the school PTA amuses me no end.