dijxtra

We have a multiparty system, but highly polarised society (reminiscent of your cultural war in the US) which results in two dominant parties, although we have all the infrastructure needed for pluralist democracy.

The biggest issue I see is the fact that gravitational time dilation is considerable on the surface of the Miller's planet, but not so much in the relatively close proximity of the planet, where the mothership is. I just don't get that part.

Sulphur and nitrogen oxides.

That would be true if carbon dioxide was the only greenhouse gas. But it isn't.

Burning biomass could be sustainable if we make sure that new biomass is grown at the same rate as it is burned. I have yet to see a document assuring me that is the case.

In any case burning biofuel is not greenhouse gas neutral. And hence not green.