Earth Houses
Buildings with soil against the walls or on the roof. They are often (partially) underground or embedded into slopes. Earth houses or shelters exist as long as humans exist.
Vertical Gardens
Having become popular in the early 21st century, this is a combination of tall apartment towers with lush green balconies.
Smart Homes
Lots of smart houses already in place through digitization and Internet of Things (IoT) capabilities of heating, blinds, aircon, fridge etc. controls. All these systems contribute to energy efficiency.
Tiny-Houses
Just live smaller, consuming less space and resources
Low Energy Buildings
Before full-blown digitization, simple architectural choices could help saving significant amounts of energy by having for example south-orientated windows and good insulation on the entire building.
