Much of WolfeWare’s business is related to renewable energy, including many of its advisory activities and publications, including a new book on utility scale solar power (see map of world's major installations here).
The main technologies used are shown with a green border in this table:
The main renewable energy technologies
Further details about renewable energy sources
and the four energy use classifications are given in here
Bio-fuel production and use
Gas capture: landfill, sewage
Anaerobic digestion and microbial biogas production