UNESCO Thesaurus: hierarchical list

2. Science

2.05 Scientific approach

2.10 Science and research management

2.15 Mathematics and statistics

2.20 Physical sciences

2.25 Chemical sciences

2.30 Space sciences

2.35 Earth sciences

2.40 Geography and oceanography

2.45 Meteorology

2.50 Hydrology

2.55 Environmental sciences and engineering

2.60 Pollution, disasters and safety

2.65 Natural resources

2.70 Biology

2.75 Natural sciences

2.80 Medical sciences

2.85 Pathology

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