In order to conduct all these big terraforming projects, you need ground staff, infrastructure, and industries. And to support them, power sources. There are a number of power sources available on Mars, but perhaps the most obvious to anyone considering colonization, is solar power. It is available everywhere, causes no pollution, and it is free.
Of course, it’s not free to deploy the solar cells, but Solar Power has a power tag in the top right corner, making it a good card for the corporation ThorGate, getting a discount of 3. It also has a building tag because it represents physical structures on Mars. Solar Power is environmentally friendly, giving you a VP, besides the energy production.
We have already seen that the Domed Crater city needed energy, but energy can also be used in various other ways on different cards. We’ll come to that… 😉