Green Mountain Energy Company will offer a 100% renewable energy option to residential and small commercial customers of Oregon's investor-owned utilities when the state opens its electricity market to competition March 1. The energy broker says the option will cost an additional $6 to $8 a month for most consumers. It will also continue to offer options already available from PacifiCorp and Portland General Electric (PGE), including 100 kWh blocks of wind energy at $2.95 each and 100 kWh blocks at $3.50 each for renewable or salmon-friendly electricity (to protect salmon habitat under threat from hydro power). PacifiCorp and PGE serve about two-thirds of the state's electricity customers. Both announced in December that they had selected Green Mountain as their new supplier of renewable power. Green Mountain says its renewable options will be generated from a combination of wind and geothermal sources.