Solar photovoltaics, wind, biofuels and fuel cells experienced a 40-percent increase in revenue growth in 2007, up from $55.4 billion in 2006, to $77.3 billion last year, according to Clean Edge, Inc., a leading research and publishing firm on clean technologies.
Revenue and energy production for last year and projections for 2017 for individual clean energy sectors are shown in the chart and table.
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