Sulfur cycling refers to the natural process by which sulfur moves through the environment, including the atmosphere, soil, and living organisms. This cycle involves various forms of sulfur, such as sulfates, sulfides, and elemental sulfur, which are transformed by biological and chemical processes. Microorganisms play a crucial role in this cycle, breaking down organic matter and converting sulfur into different forms. The sulfur cycle is essential for maintaining ecosystem health and supporting plant growth. It begins with the weathering of rocks, releasing sulfur into the soil and water. Plants absorb sulfur in the form of sulfates, which are then passed through the food chain, ultimately returning sulfur to the environment through decomposition and respiration.