TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The sorbent has a selectivity for a compound comprising sulfur over methane of 10-70. The sorbent has a surface area of at least 200 m2/g. The sorbent is molecular sieve zeolites, MFI zeolites, activated carbon, activated alumina, silicates, amine grafted silica, silico-aluminophosphates, aluminosilicates, aluminophosphates and/or metal oxides. The zeolite is zeolite 4A, 5A, Bx, NaX, NaY, faujasite, beta, mordenite, ZSM-5 and/or ion exchanged zeolites. The sorbent comprises at least 70 wt.% of (I) based on total dry fiber weight.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The dipolar aprotic solvent is N-methylpyrrolidone, dimethylformamide, dimethyl acetamide, dimethylsulfoxide, tetrahydrofuran and/or toluene. The regenerating fluid, which has a temperature of at least 50 degrees C, comprises steam, hot water and/or a gas. Preferred Process: The gas stream comprises natural gas, a petrochemical stream, city gas, diesel fuel, gasoline, liquefied petroleum gas, jet fuel, a reformate gas and/or naphtha; where a low level contaminant comprises one or more compounds comprising sulfur; and the steps (a) and (b) are repeated at least two or more times. The initial concentration of the compounds comprising sulfur is 5-1000 ppm where the contacting reduces the initial concentration of the compound comprising sulfur to a concentration of less than 1 ppm. The process of reducing the amount of one or more low level contaminants of a gas stream further comprises employing the gas stream with the reduced amount of low level contaminates as a fuel; and recovering at least a portion of the initial concentration of one or more low level contaminants. In the process of reducing the amount of one or more low level contaminants of a gas stream, (I) is substantially aligned within a compartment comprising a gas stream inlet and outlet and a regenerating fluid inlet and outlet; and a majority of (I) further comprises a lumen adjacent to (A).    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: (B) has an average thickness of 0.1-100 microns. (B) comprises a polymer comprising polyethylene terephthalate, polyvinylidene chloride, polyimide, polyacrylonitrile, polyester urethane, neoprene and/or polyether amide block co-polymer. The polymer is a cellulose acetate, polyvinylpyrrolidone, polysulfone, epichlorohydrin, a polyether amide block co-polymer, polyimides, polyolefins, polypropylene, polyethylene, polyamides, poly(tetrafluoroethene), polyvinylidene chloride, polystyrene, polyisobutylene, polybutadiene, polyurethanes, elastomers, and/or copolymers. When the sorbent is NaY, the polymer is cellulose acetate, then the sheath comprises polyvinylidene chloride; where the nitrogen permeance is less than 5 (GPU) at 30 psig. (I) further comprises a lumen adjacent to (A). Preferred Composition: The sheath dope composition comprises 15-60 wt.% of polyvinylidene chloride and 40-70 wt.% of N-methylpyrrolidone based on the total weight of the composition. The sheath dope composition further comprises tetrahydrofuran, acetone and/or n-heptane. The sheath dope composition comprises 0-2 wt.% of water based on the total weight of the composition or 1-5 wt.% of ethanol, acetic acid and/or propionic acid based on the total weight of the composition. The sheath dope composition comprises less than 1 wt.% of water based on the total weight of the composition.