Using solar panels without backup infrastructure makes renewable energy production much more affordable, efficient and sustainable.
A fireless cooker doubles the efficiency of any type of cooking device because it shortens the time on the fire and limits heat transfer losses
Modern research, which combines ancient knowledge with fast computing techniques, shows that passive solar cities are a realistic option, allowing for surprisingly high population densities.
Modern thermal underclothing offers the possibility to turn the thermostat much lower without sacrificing comfort or sex appeal.