... enshrined in the Memorandum of Understanding establishing the Regional Greenhouse Gas Initiative in the northeast United States. See, for example, Liepa, I., 2002. Greenhouse Gas Offsets: An Introduction ... As the data above indicate, however, there has been a dramatic increase in the last two years in the number of voluntary offset transactions, with an accompanying expansion in the number of ... or in hopes of gaining recognition under a future regime). In some cases, these buyers are purchasing and retiring offsets on behalf of customers. For example, they may offset the GHG emissions...