Green pavement is strong enough to hold a helicopter:A 100-sq/m area of lawn at Buckingham Palace was replace with a turf system for a helicopter landing pad. Helicopters, which had been previously landing on the lawn, were causing coinsiderable damage to the area which required constant repair.

PROS OF GREEN PAVEMENT

- Green pavement is permeable and porous — absorbs water instead of repelling it.

- Water is returned to the ground instead of being washed into the sewers.

- Many green pavement products are made from recycled materials.

- Can eliminate the need for gutters and storm sewers.

- Doesn’t ice up as quickly in the winter as water does not pool on the surface.

source : 

http://www.mytorontohomeimprovement.com/permeable-pavements.htm