With the order of magnitude of resources we are talking about (enough to colonize) yes it would be impossible to terraform either Mars or Venus. People are thi

With the order of magnitude of resources we are talking about (enough to colonize) yes it would be impossible to terraform either Mars or Venus. People are thinking about it, but not in the near-term. I think that the easiest way to terraform Venus involves scooping a gas giant for hydrogen to burn with Venus' CO2.