At concentrations that do not exceed public health standards, ozone has little effect in removing most indoor air contaminants.

Diesel exhaust has been found to contain a long list of toxic air contaminants.

Available scientific evidence shows that at concentrations that do not exceed public health standards, ozone has little potential to remove indoor air contaminants.

The concentration of ozone would have to greatly exceed health standards to be effective in removing most indoor air contaminants.

VOCs and other air contaminants are set to increase in the future as a result of continued output from the oil sands.

Yet the board had voted the month before to classify diesel emissions as a toxic air contaminant.

Diesel exhaust has been thought to contain toxic air contaminants.

These devices, since they work on atmospheric principles, cannot be installed in an enclosure containing air contaminants.

The air inside the typical home is generally dirtier than the air outside, because a house can be a source of air contaminants.

"My advice to the state at this point is to have all of the school ranges tested for air contaminants," he said.