Not only did this create small particle pollution, it also played a part in creating ozone pollution.

In particular, recent studies have shown for the first time that small particle pollution can cause cardiovascular problems, as well as lung and respiratory diseases.

The small particle size of the rare earth metals provide optical feedback.

This small particle size means that mud particles tend to stick together, whereas sand particles do not.

A line defect that, while moving through the matrix, will be forced against a small particle or precipitate of the material.