Complex sentence: Glacier Northwest plans to take steps to mitigate the deforestation of the area, which includes transplanting saplings after the various stages of mining has commenced; however, the success rate of Madrone trees surviving transplantation would be low, according to the Holden Arboretum.
Split into simpler sentences: Glacier Northwest plans to take steps to mitigate the deforestation of the area, which includes transplanting saplings after the various stages of mining had commenced. However, the success rate of Madrone trees surviving transplantation would be very low, according to the Holden Arboretum.