>>13208727Its not inconceivable so it's probably possible to do. Obviously it's beyond the capacity of current technology and infrastructure as simple probe costs billions of dollars let alone teraforming a planet + nobody wants to terraform Mars because it's still an open question whether there was ever life on that planet and terraforming would destroy or obscure that evidence.
It's probably going to be another several millennia before humans decide to properly terraform Mars and Venus and make them completely green like earth. While terragorming any planet is obviously going to be a long term project that's going to last for several thousands of years itself, it's not like there are not going to be visible positive effects even in the first 50 years or so.
Reminder climate change started only around 50 years ago and the Americas weren't even discovered until 1492 yet look at the countless cities and infrastructure it has now. Mars and Moon are probably going to be the same way in the next two millennia. The speed at which humanity develops is currently incredible and while obviously there's going to be a brick wall sometime in the future where no further speedy progress is possible (probably when we decide we want to branch out to other star systems) it's not going to be before we colonize most of the bodies in the solar system because that seems within reach, even right now.