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space has improved dramatically during the last century. Homes have become much

more spacious per occupant and largely immune to the extremes of weather

conditions. Such homes are equipped with a huge array of devices, such as indoor

plumbing, climate control, communications equipment, and entertainment centers.

The comfort factor for occupants has increased enormously.

The construction and use of modern homes and the other buildings in which

people spend most of their time place tremendous strains on their environmentalsupport systems and cause a great deal of environmental damage. Typically, as part

of the siting and construction of new homes, shopping centers, and other buildings,

the landscape is rearranged drastically at the whims of developers. Topsoil is

removed, low places are filled in, and hills are cut down in an attempt to make the

surrounding environment conform to a particular landscape scheme. The con-

struction of modern buildings consumes large amounts of resources such as concrete,

steel, plastic, and glass, as well as the energy required to make synthetic building

materials. The operation of a modern building requires additional large amounts of 

energy, and of materials such as water. It has been pointed out that all too often the

design and operation of modern homes and other buildings takes place “out of the

context” of the surroundings and the people who must work in and occupy the

buildings.2

There is a large potential to design, construct, and operate homes and other

buildings in a manner consistent with environmental preservation and improvement.

One obvious way in which this can be done is by careful selection of the kinds of 

materials used in buildings. Use of renewable materials such as wood, and non-

fabricated materials such as quarried stone, can save large amounts of energy and

minimize environmental impact. In some parts of the world sun-dried adobe blocks

made from soil are practical building materials that require little energy to fabricate.

Recycling of building materials and of whole buildings can save large amounts of 

materials and minimize environmental damage. At a low level, stone, brick, and

concrete can be used as fill material upon which new structures may be constructed.

Bricks are often recyclable, and recycled bricks often make useful and quaint

materials for walls and patios. Given careful demolition practices, wood can often be

recycled. Buildings can be designed with recycling in mind. This means using archi-tectural design conducive to adding stories and annexes and to rearranging existing

space. Utilities may be placed in readily accessible passageways rather than being

imbedded in structural components in order to facilitate later changes and additions.

Technological advances can be used to make buildings much more environ-

mentally friendly. Advanced window design that incorporates multiple panes and

infrared-blocking glass can significantly reduce energy consumption. Modern

insulation materials are highly effective. Advanced heating and air conditioning

systems operate with a high degree of efficiency. Automated and computerized

control of building utilities, particularly those used for cooling and heating, can

significantly reduce energy consumption by regulating temperatures and lighting to

the desired levels at specific locations and times in the building.

Advances in making buildings airtight and extremely well insulated can lead to

problems with indoor air quality. Carpets, paints, paneling, and other manufactured

components of buildings give off organic vapors such as formaldehyde, solvents,

and monomers used to make plastics and fabrics. In a poorly insulated building that

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