Read the following passage and mark the letter A, B, C, or D to indicate the best option for each of the blanks.

If you're an ecologist, plastic is a word you tend to say with a mock or a growl. It has grow into a figure of our lavish, throw-away society. However, there seems like little uncertainty it is here to stay, and the truth is, of course, that plastic has brought massive (15) ________, even environmental ones. It‟s not really the plastics themselves that are the criminal ─ it's the approach humanity chooses to use and (16) ________ them.

Practically all the 60 or so different kinds of up-to-date plastic are made from oil, gas or coal ─ non-renewable natural (17) ________. We (18) ________ well over two million tones of the material in US each year and, sooner or later, most of it is thrown away. A high (19) ________ of our annual consumption is in the form of packaging, and this (20) ________ about eight percent by weight of our domestic waste.