Environmental protection technology Engineering and engineering trades Environmental protection technology is the study of processes in order to minimise discharge and waste and avoid pollution. It includes programmes dealing with control of water, air, soil etc. Programmes and qualifications with the following main content are classified here: - Air pollution control - Ecological technology - Energy efficiency - Environmental engineering - Industrial discharge control - Noise pollution control - Recycling - Water pollution control Programmes and qualifications dealing with hygienic standards in food, water etc. are excluded from this detailed field and included in detailed field 1021 'Community sanitation'. Construction related to waste and water management is excluded from this detailed field and included in detailed field 0732 'Building and civil engineering'.