as the available land in an balls thawing , the begins of timber in that pollutants will decrease
de_escalation is decrease. flare_of_air_pollutants is not flare. if scale_down occurs then decrease occurs. half_timbering is timber_framing. wastage is not decrease. flare_of_air_pollutants is not destruction_event. wastage is decrease. pollution_abatement is decrease. flare_of_air_pollutants is destruction_event. flare_of_air_pollutants is flare.