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- ecological and economic assessment 1
- Ecological and economic security 2
- Ecological and economic system 1
- ecological and educational activities 1
- ecological balance 1
- ecological beauty 1
- ecological certification 1
- ecological characteristics 1
- ecological competence 1
- ecological consciousness 1
- ecological culture 1
- ecological discourse 1
- ecological economics 1
- ecological economy 1
- ecological factors, 1
- ecological groups 1
- ecological law 1
- ecological legal status of person 1
- ecological legislature. 1
- Ecological literacy 1