Question

we must observe economy in the use of material.(why) ​

Answer 1

Explanation:

The importance of observing economy in the use of materials is the reduction of costs could be of benefit to the environment. ... In contrast, organic raw materials made use of in synthetic fibers are going to be available on a nearly limitless basis for several decades to come and they are also significantly less costly.

Answer 2

Answer:

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Explanation:

hi friend.....

The importance of observing economy in the use of materials is the reduction of costs could be of benefit to the environment. ... In contrast, organic raw materials made use of in synthetic fibers are going to be available on a nearly limitless basis for several decades to come and they are also significantly less costly.