They get recycled constantly. Well, you get the idea. I read once that every atom in our bodies is exchanged over a 3-year period. There is some mysterious way in which we are so linked to all of creation that our attitudes toward God affect the natural world. But when we sin, rebel, act deceitfully, or worship other gods all creation responds with lowered production, lowered resistance to pollution.
Creation also suffers in our judgment.
The physical, atomic, material parts of us are real. God's creation of them granted them a reality. But as noted above this material universe is totally fluid.