Compositions for adsorbing ethylene gas, methods for adsorbing ethylene gas and process for making these compositions are provided. A composite material may include at least one modified amorphous high softening point wax and at least one active agent. The active agent may include at least one inorganic compound including at least one metal having at least one free p-orbital and/or at least one free d-orbital. The wax and the active agent may each adsorb ethylene.
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