Cover for a book about solar radiation, wind power and the use of groundwater heat 
Cover for a book about solar radiation, wind power and the use of groundwater heat --test --creative
Cover for a book about solar radiation, wind power and the use of groundwater heat
a book with wind turbines in the background
the cover of a book with wind turbines in the desert
the cover of a book with a wind turbine in the background
the cover of a book with windmills on it