FUNDACJA EKO-ŹRÓDŁA

85.59.B - Courses and training for acquiring knowledge, skills, and professional qualifications in non-school forms

43.22.Z - Installation of plumbing, heating, and air-conditioning systems

43.99.Z - Other specialized construction works, not classified elsewhere

58.11.Z - Publishing of books

58.19.Z - Other publishing activities, excluding software publishing

63.12.Z - Services related to computing infrastructure, data processing, website management (hosting), and other information services

71.20.B - Inspection and issuing opinions on the technical condition of chimneys and ventilation ducts

72.19.Z - Scientific research and development activities

74.90.Z - Other professional, scientific and technical activities, not elsewhere classified