I read that quarries emit particles which affect air quality. Is this true?

Quarries are indeed a source of PM10 and PM2.5 particulates. However, particles of this size are emitted by a variety of sources, including road vehicles, domestic heating (coal and wood fuels), industrial combustion sources and other industrial production processes. There are natural sources too, which contribute to ambient concentrations e.g. sea salt at coastal locations.

There is little evidence available to confirm the extent of the contribution of the quarrying industry to ambient PM10 and PM2.5 concentrations so responsible quarry operators are developing their own particulate monitoring networks. To date, measurements taken around quarries confirm that even on dry and windy days there is no significant impact on air quality in terms of fine particulate levels at residential properties located close to quarries.

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