flowchart TB block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] --> block4162construction-of-roads-and-motorways["Construction of roads and motorways"] block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] --> block4164construction-of-bridges-and-tunnels["Construction of bridges and tunnels"] block4163construction-of-railways-and-underground-railways["Construction of railways and underground railways"] --> block4173demolition["Demolition"] block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] --> block4146treatment-and-disposal-of-non-hazardous-waste["Treatment and disposal of non-hazardous waste"] block4159construction-of-residential-and-non-residential-buildings["Construction of residential and non-residential buildings"] --> block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] block4162construction-of-roads-and-motorways["Construction of roads and motorways"] --> block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] block4164construction-of-bridges-and-tunnels["Construction of bridges and tunnels"] --> block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] block4173demolition["Demolition"] --> block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] block4143collection-of-non-hazardous-waste["Collection of non-hazardous waste"] --> block4153remediation-activities-and-other-waste-management-services["Remediation activities and other waste management services"] block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] --> block4170construction-of-other-civil-engineering-projects-nec["Construction of other civil engineering projects n.e.c."] block4146treatment-and-disposal-of-non-hazardous-waste["Treatment and disposal of non-hazardous waste"] --> block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] block3760operation-of-gravel-and-sand-pits-mining-of-clays-and-kaolin["Operation of gravel and sand pits; mining of clays and kaolin"] --> block3890manufacture-of-fertilisers-and-nitrogen-compounds["Manufacture of fertilisers and nitrogen compounds"] block3890manufacture-of-fertilisers-and-nitrogen-compounds["Manufacture of fertilisers and nitrogen compounds"] --> block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] block3760operation-of-gravel-and-sand-pits-mining-of-clays-and-kaolin["Operation of gravel and sand pits; mining of clays and kaolin"] --> block3929manufacture-of-refractory-products["Manufacture of refractory products"] block4162construction-of-roads-and-motorways["Construction of roads and motorways"] --> block4173demolition["Demolition"] block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] --> block4163construction-of-railways-and-underground-railways["Construction of railways and underground railways"] block4164construction-of-bridges-and-tunnels["Construction of bridges and tunnels"] --> block4173demolition["Demolition"] block4159construction-of-residential-and-non-residential-buildings["Construction of residential and non-residential buildings"] --> block4173demolition["Demolition"] block3929manufacture-of-refractory-products["Manufacture of refractory products"] --> block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] --> block4159construction-of-residential-and-non-residential-buildings["Construction of residential and non-residential buildings"] block3760operation-of-gravel-and-sand-pits-mining-of-clays-and-kaolin["Operation of gravel and sand pits; mining of clays and kaolin"] --> block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"] block4170construction-of-other-civil-engineering-projects-nec["Construction of other civil engineering projects n.e.c."] --> block4173demolition["Demolition"] block4153remediation-activities-and-other-waste-management-services["Remediation activities and other waste management services"] --> block4251wholesale-of-wood-construction-materials-and-sanitary-equipment["Wholesale of wood, construction materials and sanitary equipment"]