Gas purification apparatus; apparatus for treating gas, namely, ventilators, faucet aerators, air ducts for distributing air as part of a HVAC system and chimney flues; electric air deodorizers, namely, physical, physico-chemical and organic deodorizing equipment using cultures growing on natural or artificial substrates; air filtering installations in the nature of equipment for eliminating olfactory noise pollution by percolating gas on a bed of filtering material with a granular or fibrous...

Data processing services in the field of big data; commercial business data analysis services; data processing services in the fields of air quality analysis, air quality control, air pollution level analysis, and air pollution level quality control