ACCORDING TO PARAGRAPH 1, THE ENVIRONMENTAL GOALS SET BY GR...

Câu 22: According to paragraph 1, the environmental goals set by green builders were initially

considered unrealistic presumably because _______?

A. there was an abundance of natural materials for the construction of conventional buildings.

B. the potential applications of technology to constructing green buildings were not recognised then

C. the problems of environment destruction were not prevalent at the time.

D. there was a lack of green builders at the beginning of the 20

^th

century.