Right now, tamping roads is impossible across the desert. This makes a lot of sense, because the desert is sandy. However, this makes being in the desert as a start really hard at first when it comes to moving resources efficiently. Since animal husbandry is coming soon, I propose the addition of camels to Eco. In the desert, wheeled vehicles or horses in real life were not used, since they either would not survive or would get stuck in the sand. Camels might be able to traverse the desert at a low speed, but with the carrying capacity of a wood cart. This makes it so they aren't totally useless but don't replace motor vehicles once stone and asphalt roads are built.