Polytunnel robot

Some continued thinking on polytunnels: it is probably within the realm of existing technological capability to create a polytunnel building robot, opening up the possibility of putting vast swathes of desert under plastic potentially allowing moisture to be retained, and succession to occur.

It might also be possible for these robots to be solar-powered, and to be able to harness local materials (self-replication would be good too, but it's a ways off). Markus Kayser's SolarSinter, hints at the possibility of putting the desert under glass, using available sand.

Perhaps a polytunnel building robot could be the next project for the Global Village Construction Set.