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ecological risk-assessment 1
ecological self 1
ecological-economic assessment 1
ecologically friendly hydration system 1
ecology 15
economic analysis 1
economic effects 1
economic efficiency 1
economic feasibility 1
economic load dispatch 1
economic valuation 1
economic-development 1
economic-evaluation 1
economic-growth 1
economical prediction method 1
economical process 1
economics 3
economies of scale 1
economy 2
economy-wide 1

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