NOVELTY - Use of a clathrate composition comprising at least one non-flammable host and at least one non-flammable guest for fighting fires.    USE - The clathrate composition comprising at least one non-flammable host and at least one non-flammable guest is for fire fighting (claimed) particularly in forest fire fighting.    ADVANTAGE - Using CO2 hydrate, which has CO2 as the guest and water as the host, for fire fighting offers the combination of two main fire fighting agents, namely water and CO2. CO2 hydrate has a higher latent heat (i.e. heat sink capacity) and better chance of reaching the base of the fire. The non-flammable clathrate solid has greater efficiency, as the clathrate solids are less affected by the flow of hot air and has more resistance to evaporation due to high latent heat content, where water tends to vaporize. This greater efficiency of solid CO2 hydrate, particularly in the form of pellets, enables less material to be used to extinguish a fire. Thus the material cost disadvantage when compared with water is minimized.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (A) a composition for fighting fires comprising a nonflammable clathrate in combination with a wettable porous solid;    (B) a fire extinguishing apparatus comprising a non-flammable clathrate composition as extinguishing medium;    (C) preparation of a carbon dioxide (CO2) hydrate composition for fighting fires comprising reacting CO2 and water where the CO2 is in excess of the quantity required to consume all the water;    (D) a method for the manufacture of a dry solid clathrate, comprising providing at least one guest and at least one clathrate host; and, allowing the guest and the host to react under clathrate forming temperature and pressure conditions, the guest being in excess of the quantity required to convert all of the host to the clathrate;    (E) use of a dry solid clathrate manufactured by a method for the transport or storage of gases; and    (F) a clathrate composition comprising at least one guest and at least one host in combination with a nonorganic wettable porous solid.