Clean energy, with double-digit growth rates and competition spanning Europe, Asia, and the Americas, has been a dynamic and forward-looking industry for more than a decade. This report is the 11th annual edition in Clean Edge's Clean Energy Trends report series.

This report represents a full decade of Clean Edge data and trends analysis. This special anniversary edition looks at the past 10 years of clean-energy activity in the U.S. and abroad.

Following one of the worst years in economic history, signs of hope have begun to emerge for the clean-tech sector, with clean energy becoming a driving force for global economic recovery from Beijing to Seoul, and Washington D.C. to Brussels.

Clean Edge, which has been tracking the growth of clean-tech markets for nearly a decade, reports that global revenues for solar photovoltaics, wind power, and biofuels expanded from $75.8 billion in 2007 to $115.9 billion in 2008. For the first time, one sector alone, wind, had revenues exceeding $50 billion.

Amid a challenging economic outlook