The ~50-megaton Tsar-Bomba reputedly "lifted" the atmosphere above its mushroom cloud off the Earth and into space. The Russians allegedly had or have a 100-megaton version which could presumably perform more "heavy lifting". There are probably more scientifically-minded readers here who possess a formula which will show the ridiculous number of Tsar-Bombas needed to make Venus safe for Humanity.
I've read that comets could be slammed into Venus, modifying its rotation, and somehow reducing or eliminating the runaway greenhouse effect. Of course, if mankind is at the point of being comfortable terraforming with comets, it may make more sense to point them toward the desert planet Mars.
"There are probably more scientifically-minded readers here who possess a formula which will show the ridiculous number of Tsar-Bombas needed to make Venus safe for Humanity."
Not to mention the nuclear fallout that would drift for a long time all around in the atmosphere - basically anything but "safe for Humanity".
I've read that comets could be slammed into Venus, modifying its rotation, and somehow reducing or eliminating the runaway greenhouse effect. Of course, if mankind is at the point of being comfortable terraforming with comets, it may make more sense to point them toward the desert planet Mars.