In order to minimise energy costs, modern buildings try to have high (a)   standards.

Environmentally friendly building methods can involve the use of traditional materials such as ___ or ___.

(a)  

Environmentalists argue that architects should never (a)   on quality or efficiency because of financial cost.

Many architects now (a)   environmentally friendly systems in the buildings they design.

Architects usually want their buildings to be (a)   and have a low impact on the environment.

To turn sunlight into electricity, roofs may be fitted with (a)   .

Some companies worry that environmentally friendly building designs are expensive and therefore not (a)   .