USA:

Green Tax Incentive Compendium: Federal and State Tax Incentives for Renewable Energy and Energy Efficiency ( Robinson+Cole)

A few weeks ago the Tax Increase Prevention Act of 2014 was signed into law retroactively extending tax incentives for geothermal renewable energy projects.

Jerome L. Garciano at Robinson+Cole has updated a PDF summary of the incentives.

Green Tax Incentive Compendium: Federal and State Tax Incentives for Renewable Energy and Energy Efficiency (PDF)