The UK has 26.7M households in 243,610km^2. That's nearly a hectare per household -- doesn't sound "suburban" to me (although maybe some parts of the US would disagree!).
Of course, the UK population is very unevenly distributed at the moment...
You still need land for agriculture, industry, forests, animal habitats, etc. Also, not all of the land in that 0.25M km^2 is habitable nor suitable for other uses mentioned above.
I've heard some calculations that in theory you could have all 7 billion people living comfortably on 50% of the land while the other 50% could go to agriculture, industry, forestation, etc. but that would require geoengineering on an unprecedented scale, not to mention being very energy inefficient.
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The UK has 26.7M households in 243,610km^2. That's nearly a hectare per household -- doesn't sound "suburban" to me (although maybe some parts of the US would disagree!).
Of course, the UK population is very unevenly distributed at the moment...
You still need land for agriculture, industry, forests, animal habitats, etc. Also, not all of the land in that 0.25M km^2 is habitable nor suitable for other uses mentioned above.
I've heard some calculations that in theory you could have all 7 billion people living comfortably on 50% of the land while the other 50% could go to agriculture, industry, forestation, etc. but that would require geoengineering on an unprecedented scale, not to mention being very energy inefficient.