The best tips for curling synthetic hair include using a curling iron set to its lowest setting, if the hair can withstand it, or to use hot water to shape the curls. The heat from hot water can be used to mold synthetic hair into any shape, with the help of foam hair rollers.
Natural gas is one of the major combustion fuels used throughout the country. It is mainly used. to generate industrial and utility electric power, produce industrial process steam and heat, and heat. residential and commercial space. Natural gas consists of a high percentage of methane (generally above. 85 percent) and varying amounts of ethane, propane, butane, and inerts (typically nitrogen, carbon. dioxide, and helium). The average gross heating value of natural gas is approximately 1,020 British. thermal units per standard cubic foot (Btu/scf), usually varying from 950 to 1,050 Btu/scf.
Natural gas is approximately 80-99% methane, with the remainder being mostly other hydrocarbons (ethane, propane, butane, etc.) as well as some nitrogen, oxygen, water, CO2, sulfur and various contaminants. Landfill gas is about 40-60% methane, with the remainder being mostly carbon dioxide (CO2).