The Book of Mormon does not replace the Bible. It is not more valuable than the Bible. Instead, it was brought forth to the world by Joseph Smith to be an equal partner of the Bible and an additional witness for Jesus Christ. Using both together increases one's spiritual literacy.
In some cases, the Book of Mormon clarifies principles and doctrines that may be a bit murky in the Bible. One prime example is the Fall of Man in the Garden of Eden. We've been taught that Adam & Eve were weak sisters because they ate of the forbidden fruit. But an ancient American prophet, Nephi, had a different conclusion, expressed in 2 Nephi 2:25.
-- Adam fell that men might be; and men are, that they might have joy.
This statement changes the entire dynamic of the Fall. Instead of being a tragedy, it became an opportunity for the rest of us to begin lining up to come down to earth and take upon ourselves mortal bodies at our appointed times.
Without the transgression of Adam & Eve in the Garden, we might still be waiting up in the spirit world to come down to earth.
Pope Francis has warned that mankind is facing a second great flood caused by climate change unless leaders act to fix corruption and injustice. The 84-year-old said that, in the story of the great flood in the Bible, God used his wrath to punish injustice and 'clean up' the world. He then added that humanity is facing another 'great deluge, perhaps due to a rise in temperature and the melting of glaciers.
Francis made the comments to Italian writer Marco Pozza, who is also chaplain of Padua prison, in a new book that is due to be published in March. An excerpt from the book - called Of Vice and Virtues - was published by Corriere della Serra on Sunday.
However, the Bible states that there will NOT be a second worldwide flood. Genesis 9:11-15 (KJV)
https://biblehub.com/kjv/genesis/9.htm
And I will establish my covenant with you; neither shall all flesh be cut off any more by the waters of a flood; neither shall there any more be a flood to destroy the earth.
And God said, This is the token of the covenant which I make between me and you and every living creature that is with you, for perpetual generations.
I do set my bow in the cloud, and it shall be for a token of a covenant between me and the earth.
And it shall come to pass, when I bring a cloud over the earth, that the bow shall be seen in the cloud:
And I will remember my covenant, which is between me and you and every living creature of all flesh; and the waters shall no more become a flood to destroy all flesh.