Natural gas become particularly active in the fields of natural gas and natural gas infrastructure, a trend started in 2005 by the formation of Scotia Gas Networks in the UK by OMERS and Ontario Teachers' Pension Plan. Another way to store natural gas is adsorbing it to the porous solids called sorbents. The best condition for methane storage is at room temperature and atmospheric pressure. The used pressure can be up to 4 MPa (about 40 times atmospheric pressure) for having more storage capacity. The most common sorbent used for ANG is activated carbon (AC). Three main types of activated carbons for
Natural Gas Choice feet of natural gas, respectively. Ohio has had Natural Gas Choice since 1997. More than 40 percent of the state's residential natural gas customers were participating in choice programs as of September 2008. Several major Ohio natural gas utilities in Ohio have plans to exit the function of supplying natural gas to customers, leaving the gas supply function to independent natural gas supply companies. In 2007, Ohio had 3,273,791 residential, 272,548 commercial, and 6,865 industrial customers. They consumed approximately 300, 159, and 295 billion cubic feet of natural gas, respectively. Currently, Ohio has 35 natural gas suppliers certified to participate