Why not create piezoelectric artificial trees able to collect rainwater and generate electricity? The tree will be able to use water from rainfall as well as the natural water table as irrigation; wind energy will provide power for the LED lights.

The idea is to develop a self-healing concrete, which could cut building costs by reducing the amount of steel needed to add structural support. Under strain, concrete will develop cracks that will eventually spread and weaken the structure. Why not mix the spores of limestone-producing bacteria and some nutrients into the concrete material. The spores will remain dormant until they are activated by rainwater, at which time they will eat the nutrients and produce limestone, filling...

The Rain house will be made of a special bio-concrete that will allow it to filter rain water. The concrete will be both PH neutral and bio-compatible with water, which will enable it produce sun-distilled water naturally. Rain water is believed to be the purest source of freshwater, and bio-concrete technology could democratize fresh water supplies by providing access to affordable clean water for small and big scale users, from families to big companies, leaving the...