@Metz
I agree with Mark, there are many areas that are not suited to more than a very low population density. And at least current level of technology can't change that. As long as energy is scarce and expensive, this situation won't change, and even with abundant energy, not all problems are solved.
Speaking about agricultural land, IMO that there isn't really much unused good farmland in the world. Most of the areas You have mentioned are to cold or to dry to make a living of farming.
Since the beginning of civilization people have been in search of the best farmland, so I don't think there is much prime farmland still available.
I've never been in the philippines, but if the region east of Manila is sparsely populated, there prob are good reasons for it: to warm, to dry, to wet, to steep, to infertile. If there are thousands of hectares of quality land available for free or a minimum rate, give me details to start a farm operation there....
Mike
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