MarsBot's Failed Action

When MarsBot can't do something, it takes a Failed Action instead and gains 5 M€. That happens for a project card with no tags, a tag whose track is already at its end, a track action it can't do (such as raising a maxed temperature), a milestone or award it can't claim or fund, and a bonus step that gives a terraforming action it can't do. A bonus card it can't resolve is not a Failed Action.