Gonzo I am sure there exist "ideas" how you could get a certain species back ... but recreating a whole ecosystem is right now as feasible like cities on Mars. Why not avoid the issue in the first place by ... making a bit less business? You're telling me right now there is no need to stop smoking because maybe some day eventually they will find a possible solution to cure all kinds of cancer. But why take the risk? Better stop smoking now look at your health hand avoid the issue all together. That's what I am saying. There are way to many risks involved. What if those technologies come to late? Or never? What if we destroy our self in a nuclear war due to increasing tensions and global instability? Prevention is ALWAYS(!) cheaper compared to dealing with the consequences.