I just spent a fantastic vacation in Ireland, traveling between Dublin, Cork, and Galway by car--which meant a lot of narrow but very well-kept roads between many tiny towns. The idea that double, even triple, the population of Ireland would somehow not have "forests and open space to adjourn to" is...well...it's interesting.
Wait, did I say interesting? I meant "horse manure". That is an empty country, with plenty of room and remarkably little need for the sort of xenophobia you've espoused in this thread (a xenophobia that no one I met in Ireland seemed into, either!). And I don't think HN needs it, either.