Yes most certainly and it is called living roofs.
And is a great solution to utilizing space as well as insulation against either heat or cold ,for the accomodations, green lawns is extravegant unless you got a goat grazing up there (got friends in south Africa who got that)
It means slightly different construction with concrete roofs at a very gentle slope (for drainage)
damp coursing the concrete with black plastic,(Although the Aztezs used moss)
installing irrigation systems.and leaving easy ways up to the roof ,with ramps
The walls and reinforced corner pillars must be of sufficiant strengh to support the extra weight ,as should the cross beams under the roof .
If you decide to go the full living roof way
which means at least 1/4 of a meter of soil to support the weight of the wet soil.
No more than 3 stories is recommended before doing the living roof .
Have the slope in a Northern direction to make full use of the sun(depending which hemisphere you are in,,and so that you could also incorporate solar panels.
But you can also put lots of flowerpots up if you just want some flowers ,standing on planks (the simple small way)
URBANISATION IN A SUSTAINABLE ,AUTOSUFICIENT & HEALTHY MANNER
Why this is recomended
They did some experiments with rats in highrise building conditions and after the 3rd story they began to get weird
by the time they were on twenty they went insane and ate their own babies .
This gives you some idea what the bosses must be like in the penthouse offices
So 3 stories is a reasonable healthy hight for humans they have discovered BOTH MENTAL AND PHYSICAL HEALTH
so we cannot put to many people on top of each other
technically it is an impossible task to ensure a continues supply of good air for everybody
and the mental effects are drastic ,
but we can blend people into and under the landscape
A REVOLUTIONARY BEAUTIFUL SOLUTION
there is an Architect who designed a city in China that blended totally into the landscape ,the farmland ending on top of all the equal level roofs ,with the farmers moving about on bridges
All the rooms would have the sun at least once a day,The city to utilize all their own byproducts as gas for cooking or compost
With solar energy to power the lot
The land above would produce all the food and meat for the city
A totally auto sufficient concept ,with agriculture build in in a sustainable way.
Very technical and advanced
it is talked about on this youtube at the end
So the answer is urbanization incorporated with agriculture
Aggro urbanization,coupled to Aggro forestry.
Food and animals with in forests
and people hidden 3 levels underneath the farms ,all housing having what is called living roofs(have done some myself with pasture and goats on the roof ,and seen many of these) ,with pasture and vegetables ,this would also keep the dwellings cool.
IN THE PAST
Montezuma looked out of his window one day and saw all his peasants in huts of adobe as a blemish on his panorama ,and he ordered the people to hide themselves beneath beautifull flowers (deoderant was not so big in those days),and so the central Americans were motivated to build living roofs ,turning their village in to a garden with themselves hidden with in ,So the idea is by no means original
Babylon was doing very similar things using sophistcated building methods and stone
This concept can spread into the country with out depleting it
leaving room for expansion
It is a collection of sustainable ideas from around the world coupled to present level of knowledge
ideally suited for those who want to get back to the country and build a autosuficient situation for themselves and the family or a comunity .
People plant rather for the quality of life and to feed their families, than for the market ,so the motivation and the manner are totally different from ordinary agriculture .
Although the basic concept of Permaculture also applies to Organic and sustainable farming,
Utilising soil manegement ,and mulching
Building soil instead of diminishing it
Using organic pest control instead of chemicals
Harvesting water instead of depleting sub teranean reservoirs
Planting in guilds and bio diverse to ensure healthy chemical balances with in the soil,and cut down on possibilities for pests
The utilization of space is more concentrated ,thinking in cubic and vertical terms instead or merely horizontal on the plain ,
Having many principle to follow such as utilizing all resoures and following and enhancing energy flows ,
Intelligence in design
For example the ditch around the house catches the rain water and leads it through the chicken house where it cleans and picks up the manure to deposit it in the vegetable patch
Permaculture means permanent agriculture
a concept put forward by Bill Mollisson in the 60`s
Which offers practical solutions for energy systems ,infrastructure ,inteligent design in housing,
animal shelter ,water systems and sustainable agricultural practises.
With the world and it`s history as it`s source
From the chinampas of Mexico to the teraced gardens of the Andes.
From the dessert whadis to the steppes of Russia.
Covering all climatic conditions temporal, dessert, humid and dry tropics.
With chapters on soil ,Water harvesting and land design,Bio diversity
Earth working ,Spirals in nature,Trees and water ,utilizing energy flows,
Strategy for an alternative nation
The Permaculture designers manual by Bill Mollison,which cost about 40 dollars.
And is the best all round book you can get,on Environmental design,.(tagiari publishing, firstname.lastname@example.org)
this book also has many gardening tips,bio-gas,companion planting and ideas for structures ,how to cool down houses in hot climates ,how to warm up houses in cold climates with out using technology but rather by design.
Some other writers that are on the internet are
Masanobu Fukuaka has written ,
The Road Back to Nature
The Natural Way of Farming
other permaculture links in Yahoo are
choosing a site
counter acting erosion
the rippling effect
organic pest control & growing your own food
Intelligence in design