TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The polymer backbone and the hydrogen-affine host complexes are thermally, chemically, mechanically, magnetically, electrically or radiatively stimulated. Preferred Method: The inclusion step occurs through physiosorption or weak chemisorption, as hydrogen (H2), proton (H+), or H2/H+-water complexes. It occurs by forming a chemical compound containing H2.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The polymer backbone comprises a biopolymer. It comprises chemically linked monomers. Preferred Method: The method may involve forming a folded polymer backbone comprising physico-chemically-linking hydrogen-affine host complexes incorporating hydrogen; unfolding of a folded polymer backbone having incorporated hydrogen; and activating the hydrogen-affine host complexes to release the hydrogen. The folded polymer backbone is formed by forming the polymer backbone; physico-chemically-linking hydrogen-affine host complexes to the polymer backbone, folding the polymer backbone having physico-chemically-linked hydrogen-affine host complexes; stimulating the polymer backbone to unfold the backbone and prepare for hydrogen inclusion; incorporating hydrogen in hydrogen-affine host complexes of the unfolded polymer backbone; and folding the polymer backbone with incorporated hydrogen. It can be formed by linking a monomer comprising a physico-chemically-linked hydrogen-affine host complex to another monomer comprising a physico-chemically-linked hydrogen-affine host complex to form a partial polymer backbone; sequentially linking additional monomers to the previously-formed partial polymer backbone until the polymer backbone is formed; folding the polymer backbone; stimulating the polymer backbone to unfold the backbone and prepare for hydrogen inclusion; incorporating hydrogen in complexes of the unfolded polymer backbone; and folding the polymer backbone with incorporated hydrogen. It can be formed by sequentially linking and concurrently folding monomers, each has host complex with hydrogen to form a storage medium. The storage medium is regenerated by unfolding a polymer backbone and concurrently releasing hydrogen from hydrogen-affine host complexes and unlinking monomers from the polymer backbone.