Demographic Density Maximum

What is the “demographic density maximum limit", before the Health of the Land, of the area, region or “suburb” falls below it's sustainable productivity level?

Working on one-storey, single-level housing.

Australia's 1/4-acre, demographic spread, with the structure specifically built for Human housing filling about 1/4-to-1/3, and of course upto ¾ and more, of the ¼ acre block, effectively takes, in-general, ½ of the “earth's skin” surface soil, out of productive organic arable use.

Another way to look at this is by asking “How much “arably-used” land - soil, water, “wild” and Native fauna and flora, all contributing to the Durability of the Land, assisted by humans and their designs for Most Efficient, Economical Land use, does, as a reference-point, one Group of say, 20 people - 10 adults, 10 kids (five “nuclear families”), from babes to 16y/o, need, to sustain, 1st, their food supply, 2nd, their housing, 3rd, Habitat upkeep and maintenance, 4th, personal needs, but beneath and before all these, the perennial ability of the Land to keep producing what IT needs, as well as what the rest of us, it's offspring, require?”

Economies-of-Scale are necessary in such questions, and options like multi-storey AND underground housing come-up. Or..., down.

Calculations are called-for in adding-up the FOOTPRINT per each 1/4-acre, as well in the sum of all this local, but also regional and, where imported materials are used, global land use, and/or-versus productivity, and IT'S FOOTPRINT, as it all contributes to reducing Earth's skin-surface arable soil levels to below our “living-sustainably” minimum.

Urban 1/4-acre sprawl is surely, as Nobel Prize Recipient for Economics Professor Paul Klugman has said “...one of our world's greatest disasters!” (paraphrased)

Solutions to making a difference, must, I calculate hypothetically, include resourcing building and improvements materials LOCALLY, in-the-main-part, from the very rock or earth we “own”.

This obviously refers to the housing and other structures' being made of “mud-brick” for one, if clay is aplenty, “fired” brick, with home-grown “renewable” fibres like hemp and as well, hemp resin etc.

Combining design, Wholistic Demographics, Technology and Organics, “In-House”.

Now, however, in designing-in “hemp”, we're talking necessary “Just Corrections” (Evidence-based) in Law.

But..., Law in both corrupted “Housing Policy” in Council, State and Federal government, AND throughout the “western-hemisphere”, where building-supply and "development" mega-corporations “own” government “housing ministers” “Council urban and zoning design departmental heads”, legislators, and even courts, to extract the most dollar profit from the whole sheebang, and in legalizing industrial hemp production as a prolific renewable and enduring building material, automobile and metal industries material.

Oh? Afghanistan, and the “silk road”?

Oh? The “western hemisphere”?

Today's call by the NSW Opposition for an inquiry into government corruption might, were-it Impartial, take in these considerations as well?

And aren't the Opposition tarred with the same brush.........?

Revolution....!