The major natural gas industry trade association, based in Alexandria, Virginia. AGA conducts technical research and helps create standards for equipment and products involved in every facet of the natural gas industry. It also compiles the statistics that are considered to be industry standards. The AGAÂ’s weekly report on how much natural gas is in storage is closely watched by traders. If gas supplies increase, then prices are likely to decline and vice versa. AGA also creates outlooks for the industry and compiles heating degree and cooling degree data. See also heating degree day and cooling degree day.