Nowadays, projects involving this technology are already been implemented, and some are funded by the government and/or private companies or organizations, especially relating to power generation.
Just for some who are interested on pursuing these kind of projects, government of most of every country in the world has already provided the information that tells us where can this source of specific energy (i.e. geothermal, solar pv, solar thermal, hydro, tidal, etc.) has its potential in a given country.