COPEMISH, Michigan — Giant sequoia trees generally grow on the western slopes of California’s Sierra Nevada Mountains. But, for the past 73 years, three sequoias have survived and thrived along a bluff overlooking Lake Michigan in Manistee. That’s not supposed to happen, but it is. The genetics that make up the Manistee sequoias have become an obsession for a northern Michigan man who believes with conviction the trees’ DNA is the solution to global climate change, and the cutting-edge work and research he’s doing will eventually prove it. …For the past few years, Milarch has taken DNA from the Manistee sequoia, as well as from California redwoods, and has been cloning, then growing them inside the Archangel lab using a cutting-edge process called micropropagation. …Milarch has cloned the Manistee sequoia countless times and has shipped the trees to countries all over the world.