Why not use consideration rather consciousness?

[FangFang]

Business English Lesson, Advanced Level

ESL/EFL Test #233 "Globalization in Aviation", question 9

A factor which is having an increasing impact on civil aviation, and one which is likely to grow in importance in the future is environmental ..........

(a) commitment
(b) conscience
(c) consciousness
(d) consideration

Business English Lesson, Advanced Level

ESL/EFL Test #233 "Globalization in Aviation", answer 9

A factor which is having an increasing impact on civil aviation, and one which is likely to grow in importance in the future is environmental consciousness.

Correct answer: (c) consciousness
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Hello again!

Please tell me why not use "consideration", rather "consciousness"?

Thanks!

[Mister Micawber]

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Environmental consciousness (environmentally-conscious) collocates closely these days. I also think consideration would have to be countable plural (considerations) here to seem normal.
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Native English teacher at Mister Micawber's