
CLEAN EDGE
The United States has seen a significant shift in its energy landscape since Clean Edge began publishing its clean-tech leadership index five years ago. The transition to a clean tech and energy efficiency-based economy, based on the many indicators we track, is well underway. Solar and wind power, along with natural gas and energy efficiency, are now the mainstream choices for meeting the nation’s electricity needs; coal-fired and nuclear power, the dominant choices of the 20th century, have become the marginalized “alternatives.”