Many minerals in the asbestos family can absorb light with a wavelength measuring two-point three micrometers.

VOA: special.2009.11.17

But HEPA filters cannot remove disease-causing particles smaller than zero point three microns.

VOA: special.2009.07.14

Minnesota and Utah had the lowest rate twenty-three point one percent.

VOA: special.2009.07.21

But Arporn says that Thailand's overall economy will get a boost from strong export growth - up between three-point-five to four percent compared to 2009.

VOA: standard.2010.03.27