👉 A chemosphere is a thin, protective layer of gas or solid matter that surrounds a surface on which an organism's chemical reactions are occurring. This layer can protect the surface from damage by absorbing toxic gases and chemicals, such as sulfur dioxide, nitrogen oxides, and carbon monoxide, and allowing the organism to continue its chemical reactions without being damaged. Chemesepses have been observed in various organisms, including bacteria, viruses, and plants, and are thought to play a crucial role in their