An abiotic factor is a nonliving part of an ecosystem that shapes its environment. In a terrestrial ecosystem, examples might include temperature, light, and water. In a marine ecosystem, abiotic factors would include salinity and ocean currents.
Chlorofluorocarbons (CFC) are responsible for the depletion of the Ozone layer. The Ozone Layer helps keep out harmful UV rays that can otherwise cause skin cancer in humans and burn plants. CFCs cause chemical reactions that cause the ozone molecules to break down, strong ultraviolet radiation, releasing chlorine atoms, and then reacts with Ozone molecules. Bacteria and fungi are called as decomposers because they break down the dead and decaying organic matter into a simpler substance. It provides the nutrients back to the soil.