trea - UN E
- treated sewage
- treatment of radioactive wastes
- tricking filter
- trough
- turnover
- ugod'ye
- ultimate biodegradation
- ultimate oxygen demand
- ultra-filtration
- ultra-low volume spraying with a pesticide
- UN Commission on Sustainable Development
- UN Convention on Biological Diversity
- UN Convention on Climate Change
- UN Convention to Combat Desertification
- UN Convention to Combat Desertification in those countries experiencing serious drought and/or desertification, particularly in Africa
