Revising the release levels from this category is advised, since the revised emission factor values in the 2013 Toolkit may affect the release levels by one order of magnitude as compared with those that had been determined using the previous emission factors. It important to establish activity rates in artisan brick production especially in situations where there are no statistics for production rates and there are indications that the estimated artisan production rates are significantly high as compared to commercial production. Construction/building statistics may assist in arriving at a reasonable estimate. It is also important to establish the types of fuels used, as the use of contaminated fuels influences the emission factor by one order of magnitude.