It covers more space with less material than any other building ever designed.

VOA: special.2010.05.30

He tested the cement, and says less could be used because the rice hull ash makes it a stronger building material.

VOA: special.2009.12.01

Also,the inventors say the light-colored material better reflects sunlight, so buildings would cost less to cool.

VOA: special.2009.12.01

Adding organic material such as compost to soil can also make lead less available to plants.

VOA: special.2009.06.09

Experts say the denser the material, the less radiation reaches the skin.

VOA: special.2010.07.06