portland

Stories about people living in mines, caves or abandoned tunnels are not strange stories.

The northwestern US coast has been shaken by a powerful earthquake but has no damage and no tsunami warnings.

Polymers Cement (Geopolymer), is an innovative and environmentally friendly construction material developed at the Technology Center ...

Polymer concrete. This concrete not only reduces greenhouse gases but also increases the durability of construction works many times.

Sometimes only a photo can tell the whole story or take you into a stream of emotions. Here are the most impressive photos in the gallery