Mein Gipfellogbuch: Das Bergtouren Tagebuch zum selber ausf�llen ♦ Wandertagebuch f�r die sch�nsten Wanderungen, Aussichten und Erinnerungen ♦ A4+ Format ♦ Motiv: I'm not lost - Landkarte

If you're planning to spend on Renewables (or just want to know more) this guide provides an introduction to the various products and technologies available for the technically (and not so technically) minded.
Written to provide an understanding of various renewable energy technologies and energy saving methods - the issues, economics, how they are applied, what they can and of equal importance, what they can't do.