They will call their spaceships American Space Ship (ASS) and their heavy lifting vehicle will be called Formidable Ascension Transport (FAT). "Houston FAT-ASS has a problem"

You are making one big mistake. Green is the one color the plants do NOT use. If the plant would absorb green, you wouldn't see the green, cause it wasn't reflecting. Since the plants are observed as green you know the plant is reflecting the green wavelengths. This is the basics of absorbing and reflecting. Why they are talking about black or grey, is that the plants would absorb all or almost all light and thus not reflecting (much) light and appear as black (or grey). But why would plants be black only with 2 suns? why not with one? I could imagine that with lesser light (one sun) you would have a much more beneficial perk if you could absorb more light. The limiting factor is not the light I imagine but the other resources like nutrients or water. Even possibly gravity or wind speeds could be limiting for growth. So the article is utter bullocks if you ask me.