In Depth: Chest. A womanâs chest â like the rest of her body â is covered with skin that has two layers. 1  The epidermis is the outermost layer that provides a protective, waterproof seal over the body. 2  The dermis is the under layer that contains sweat glands, hair follicles, blood vessels, and more.
Natural gas is furnished by privately owned Puget Sound Energy, which began its existence in 1886, generating electric power as the Seattle Electric Light Company.
Propane, which powers many kitchen stoves and outdoor grills as well as home heating systems, is derived from natural gas. Natural gas is also used to generate 21% of our electricity. (See Our Energy System for an overview of how natural gas is used in the United States.).Natural gas is often described as âclean burningâ because it produces fewer undesirable by-products than gasoline.Like all fossil fuels, its combustion emits carbon dioxide, but at about half the rate of coal.atural gas provides 24% of our energy. Unlike oil, almost two-thirds of which is imported from foreign sources, our natural gas comes primarily from North America. The annual volume of consumption is projected to rise from 22.5 trillion cubic feet (tcf) in 2009 to about 23.5 tcf in 2030.