Correct. Humans are great consumers of natural resources. Future generations would probably like some petroleum for heavy industry, lubricants, waxes, asphalt, plastics, fertilizer, medicines, refrigeration etc.. Lithium for our wonderful batteries is a finite resource found in few places. Copper, and gold reserves are fewer and far between and are requiring massive amounts of earth to be moved for the precious metals.  There is no magic bullet to save us from our energy needs. Conservation is the best solution, along with smart use of numerous energy sources. Some people even think it will be wonderful when human's can go off and inhabit other planets. Really? Give up our nice green and blue planet to struggle for survival under a dome. Not my idea of a good time.