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

Rajan Vempati thinks rice hull ash could help the concrete industry produce less carbon dioxide.

VOA: special.2009.12.01

It is less useful for ash which has yet to fall and instead is distributed, in clumps and layers, at various altitudes and thus in different wind conditions through a large patch of atmosphere.

ECONOMIST: Volcanoes and air travel: Small eruption in Iceland | The

Add to that the extraordinary talent in the kitchens of Dublin's Michelin-starred restaurants as well as in hole-in-the-wall cafes in the countryside, and you have nothing less than a culinary rebirth, a phoenix rising from the coal ash, deliciously.

WSJ: The New Green Cuisine

But at a site 50km east of the eruption, a quarter of the ash falling to the ground was in the form of particles of ten microns or less.

ECONOMIST: Volcanoes and air travel: Small eruption in Iceland | The