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- Urucui 2
- Urucuia 1
- Urucum 16
- Urucurana 1
- Urucuri 1
- Uruguai 4
- Use 28
- Use of fire 1
- Use of organic waste for composting 1
- Useful insects 1
- User feedback 1
- User interface 2
- Users study 1
- Uses 3
- Usina 2
- Usina de beneficiamento 1
- Usina de etanol 1
- Usina de Mandacaru 1
- Usina Hidrelétrica Franca Amaral 1
- Usina São Francisco 1