An environmental limitation ordinarily would not significantly affect the range of
work existing in the national economy for individuals with the physical capacity for
heavy or very heavy work.
A need to avoid only excessive amounts of environmental pollutants that exist to some degree in most work places (e.g.,
dust, noise, etc.) does not significantly impact on any range(s) of work.
An inability to tolerate very little dust, noise, etc., significantly impinges on
all ranges of work since very few job environments are entirely free of irritants,
pollutants and other potentially damaging conditions.