Studies show how this can reduce dust levels to one per cent of those in conventional mattresses.

Federal regulations require mines to keep dust levels in the shafts below 2 milligrams per cubic meter of air.

The officials also said they would require automatic misting systems to keep dust levels down during processing.

Environmentally Otta seal helps to lower the dust level.

Companies should enforce the maximum permitted dust levels.

This helps to 'clean' the feed and reduce dust levels.

The mine safety agency may then require a company to take immediate measures to decrease dust levels, usually by increasing ventilation.

These channels were selected to measure temperature, pressure, water vapor and dust levels.

Water is extensively used to suppress airborne dust levels.

An environmental consultant hired by the parents has advised them that the school's dust levels are "a potential health concern."