The energy cost needed to lift people into space is enormous. A lot of this is basic physics, and it's going to be difficult to get around both the resource spend and pollution in that.
(People probably fly too much, and even now somewhere around 20% of humans has ever been in a plane)
A) There's more radiation in space
B) Getting people to space puts their bodies under a lot of stress, and has its own risks
C) Most environments in space are not that clean/healthy even apart from the radiation
D) The costs involved make all this impractical for all but the very richest of people
FORTUNE'S FUN FACTS TO KNOW AND TELL: A black panther is really a leopard that has a solid black coat rather then a spotted one.