Wow, that was a sad read. I general tone was "My god, our planet is on fire and you want to spend time and resources going somewhere else?" Which I understand, after all we're spoon fed that message every day, but if you think critically about it you realize that the species as a whole will have to figure out how to live on Mars or its doomed anyway.<p>I get the emotional angst, many people will remember that point where they realized "Hey my parents aren't going to be here forever, if I don't get job and stuff I'm dooooooomed." It's a scary thing because it involves doing something you may have never done before or may have tried to do and failed a couple of times. But once you internalize the fact that your parents are mortal and of finite resources and you <i>can't</i> change that, you put that fear aside and start figuring out life "for real."<p>The same thing is true with this planet. Our ability to monitor it and study it has reached a point where we realize the environment we currently live in is going to change, and change harshly. While we're currently the proximate cause of that change we know there are many things that can cause that change and have in the past. Perhaps not in the living memory of our species but we've certainly seen the humans frozen in glaciers right? So at the end of the day, <i>it doesn't matter why</i> the climate changes, we must evolve our thinking so that we can live on an airless moon, or a chilly planet far from oceans and abundant greenery.<p>And getting serious about it means picking a problem to solve and solving it. If we can create a self sustaining colony on Mars for example I have no trouble believing we can create cities on earth that survive what ever changes come in the climate. And if we have self sustaining cities on Mars and Earth then if one gets blasted by an asteroid (known to happen) the other one can help out instead of everyone just dying.<p>Its the difference between moving forward into the future knowing what you have to over come, and hiding in the past hoping to somehow prevent the future you fear.