Commodities of Martian Rails: Solar CDs

Martian Rails (2009), the crayon board game manufactured by Mayfair Games about railroading on the Red Planet in which players build tracks and haul freight in sleek trains with names like Spirit, Tweel and Viking, has a long list of cool commodities that players can transport to generate revenue for their rail companies. For example:

Solar CDs – Substrate material used for collecting solar energy. They store digitized energy from the Sun onto a CD for playback later. The “leftovers” can be used to heat a Mars habitat. On Mars, the most economical place to manufacture Solar CDs is on top of Mons Olympus since it is above most of the atmosphere.

Martian Rails is loaded with references to Martian SF!