1/5 is converted to energy, the rest is radiated into the surrounding area just like pavement does, albeit a little less than asphalt. Vegetation, absorbs light and emits heat as well, but it also cools the area via evaporative cooling. What people need to realize is that solar and wind power aren't completely free of environmental downsides. The best solution is to distribute your power generation among all the ways of making power. But honestly the best way to make power is hydroelectric, always has been. The Niagara powerplant provides 1/4 of all New York State's power.