The planet Venus is often referred to as Earth’s “Sister Planet”, and rightly so. In addition to being almost the same size, Venus and Earth are similar in mass and have very similar compositions (both being terrestrial planets). As a neighboring planet to Earth, Venus also orbits the Sun within its “Goldilocks Zone” (aka. habitable zone). But of course, there are many key difference between the planets that make Venus uninhabitable.
For starters, it’s atmosphere over 90 times thicker than Earth’s, its average surface temperature is hot enough to melt lead, and the air is a toxic fume consisting of carbon dioxide and sulfuric acid. As such, if humans want to live there, some serious ecological engineering – aka. terraforming – is needed first. And given its similarities to Earth, many scientists think Venus would be a prime candidate for terraforming, even more so than Mars!
Over the past century, the concept of terraforming Venus has appeared multiple times, both in terms of science fiction and as the subject of scholarly study. Whereas treatments of the subject were largely fantastical in the early 20th century, a transition occurred with the beginning of the Space Age. As our knowledge of Venus improved, so too did the proposals for altering the landscape to be more suitable for human habitation. ...”
lots more at link
https://www.universetoday.com/113412/how-do-we-terraform-venus/
Yup!
Nasty place. But it has some natural resources that immediately available unlike Mars.
Venus can be cooled down via the addition of a LOT of water, most of which would eventually disappear (with the heat) into high altitude geysers. But the planet has a retrograde rotation on its axis, and takes more than a Venerian year to make one full rotation. So, unless the rotation rate can be increased (even in a retrograde direction, although that isn't going to work long-term because of the tidal transfer of momentum), the only way Venus can be made workable for Earth life (and probably not for humans) would be the further addition of water, turning the surface into a global ocean. And cooling it down would take centuries, probably thousands of years.