Venus is Earth’s sister planet. It has almost the same size and gravity as Earth.
As you know, the Venus atmosphere is extremely harsh. So bleeding into space would be one way to make the planet more friendly to people.
The one big thing about Venus is that it’s atmosphere is way thicker than Earth’s. There’s no known technology that could somehow siphon all the air from Venus and send it adrift in space anymore than we could siphon all our CO2 on Earth into space.