As one of the best known and commonly used materials, wood is the epitome of a renewable raw material.
With its fast growth and extreme robustness, grass could be the raw material of the future. It can be harvested locally several times per year and has unique strength properties.
Eucalyptus is an excellent alternative to other raw materials: It is fast growing and there's no watering or use of pesticides necessary.
As food industry waste products tomatoe stalks/ nut shells qualify as outstanding alternatives to other materials that have to be grown specifically for industrial use.