I am not a scientist. I'm a drop out ... but a creative , musician and thinker. Recently I have been thinking of the damage caused to the planet since the start of the industrial revolution and have been pondering on why in this day and age governments have not put a stop to it.
Parallel to this I have always been interested by the thought of space, and in particular the mars rovers and the possibility of man one day being able to "venture where no man has before". These coinciding thoughts have previosly never gelled until I started looking into Mars atmosphere and rad (radiation) levels.
We of course cannot survive in the conditions of another planet in our current state. We would be unable to breath and survive. Take Mars for example, it has over twice the radiation that astronauts face on the international space station 5x what we experience, is over 96% carbon dioxide , some argon, a bit of nitrogen , hydrogen , oxygen and funnily enough water vapour.
Since the start of the industrial revolution our atmosphere has changed somewhat eg fumes from industry, cars , trains, airplanes, radiation from microwaves, mobile phone masts. And every year the become stronger and more potent. This undoubtedly isn't healthy unless we adapt and evolve. Which is something that humans as a species are very good at.
I'll tell you what I would do if I thought I'd have to leave one day .
I'd start upping the radiation levels every couple of years through progression in cellular technology. Cut down the trees so there is far less carbon dioxide converted, start burning copious amounts of fuel releasing carbon monoxide and raising the temperature of the planet melting ice and eventually causing higher levels of evaporation causing more water vapour in the atmosphere. We already have low levels of hydrogen, nitrogen and the argon levels here are just under half that on Mars.
If you can do all that and still be here ... your one step closer to being able to jump ship.
As I stated at the beginning I have never studied the chemistry, physics or biology relating to this topic or extensively looked into how possible this "theory" may be so please dont hate. I just thought I would bring it to the people who know more than I do