Encyclopedias, Almanacs, Transcripts, and Maps
- Nirvāṇa
- Nishida Kitarō
- Nitrates and Nitrites
- nitrogen dioxide
- Nitrogen Oxides
- Nitrogen Waste
- nitroglycerine
- Niẓām al-Dīn Awliyāʾ
- Niẓām al-Mulk
- Njo̹rđr
- No-Observable-Adverse-Effect-Level
- Nock, Arthur Darby
- Nok
- non-figurative
- Non-point Sources of Pollution
- Non-Timber Forest Products
- Non-Western Environmental Ethics
- Nonattainment Area
- Noncriteria Pollutant
- Nondegradable Pollutant