We can, certainly. It's good to have a "backup" drive, so to speak.
But the point remains. If we took care of our own planet, this wouldn't be as pressing of an issue.
Glad I could respond, hope you will do the same and looking forward to hearing back : )
Thank you for your comment, yes I agree in that we must take care of what we have got before worrying about how we can colonize a different planet!