In what year was the album “Blue Sky Mining” released by Midnight Oil?

In what year was the album “Blue Sky Mining” released by Midnight Oil?: The album “Blue Sky Mining” was released in 1990 by Midnight Oil, featuring 11 tracks.
What is the most successful song from the album “Blue Sky Mining” by Midnight Oil?: “Blue Sky Mine” is the biggest hit from the album “Blue Sky Mining” by Midnight Oil.
What are the main songs from the album “Blue Sky Mining” by Midnight Oil?: The main songs from the album “Blue Sky Mining” by Midnight Oil are “Blue Sky Mine”, “King Of The Mountain”, and “Forgotten Years”.

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