Over 33% of states have initiated measures to limit greenhouse gas emissions, primarily through the creation of GHG emission inventories and regional cap and trade programs. Although most state-level initiatives focus on large-scale sources of GHG emissions, such as coal-fired electric plants, there are potential for smaller ones to be subject to emission limitations or allowance purchase requirements in the future. Moreover, Congress may consider passing legislation to reduce greenhouse gas emissions, which could adversely impact Greylock Productiona's business capital expenditures and financial results.