The answer to this question is More elastic A product usually become inelastic if that product does not have any subtitute to fulfill the same function. In the long run, advancement in technologies will create a way cheaper method in producing energy (such as electric, nuclear, or solar) which will make natural gas become more elastic.
I'm am unsure what context the answer needs to be in or how specific they need to be. Minerals are used in most building supplies, fertilizers, cooking ingredients, and machinery.
