A new report (PDF) from the American Solar Energy Society shows that as many as 1 out of 4 workers in the U.S. will be working in the renewable energy or energy efficiency industries by 2030.

The report shows that these industries already generate 8.5 million jobs in the U.S., and with appropriate public policy, could grow to as many as 40 million jobs by 2030.

The 40 million jobs that could be created in renewable energy and energy efficiency by 2030 are not just engineering-related, but also include millions of new jobs in manufacturing, construction, accounting, and management.

Renewable energy and energy efficiency industries today generate nearly $1 trillion in revenue in the U.S. contributing more than $150 billion in tax revenue at the federal, state, and local levels, according to the report.