This document discusses various passive architecture designs that utilize wind and solar energy. It describes the working of a Trombe wall, which uses a hollow wall to circulate air and heat it with solar energy. Overhang walls and winged walls are designed to prevent solar radiation from entering rooms in the summer and allow it to enter in the winter. The document also discusses wind energy conversion systems, including the basic components and working of a wind turbine. It notes some disadvantages of wind energy and explains that the theoretical maximum efficiency of a wind turbine is 59.3% according to Betz's law.