To date, California has built 2, 541 megawatts of renewable energy under the renewable portfolio standard program.

FORBES: California Reveals Price It Pays For Renewable Energy

In a letter to Senate leaders last week, nearly 200 companies, industry groups and environmental organizations urged lawmakers to implement a renewable portfolio standard in new energy legislation.

FORBES: Magazine Article

Many Senate Republicans--especially in the Southeast where wind power is scarce--aren't comfortable with the "renewable portfolio standard" mandating utilities provide a minimum amount of clean energy production.

FORBES: Why The Energy Bill Will Die

The primary sticking point is the inclusion of a renewable portfolio standard, requiring most utilities to obtain 15% of their energy from renewable sources like wind.

FORBES: Mr. Culver Goes To Washington

It remains unclear whether the House version of an energy package, to be taken up this year, will include a renewable portfolio standard.

FORBES: Magazine Article