It would depend on location... here in the northeastern USA, it's just a big
polyculture lawn, although you could get into the nitty gritty about how you mow it I suppose. It may take a while to mow an entire soccer field with my two foot wide rotary mower, even if that's the greenest option for my tiny lawn.
In Egypt, well, I have no idea. I assume it isn't sand, since nobody really wants sand kicked in their eyes (except volleyball players I guess), and AstroTurf has a lot of embodied energy, but it might still beat natural turf unless you have an awful lot of greywater not already being reused somewhere better.
Or maybe it really is sand, with sport goggles for all the players??
Hopefully someone with
experience in arid climates will chime in. I think it's a great question.