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- education effects[remove]2
- farming methods2
- water conservation[remove]2
- Egypt (Africa, Northern)1
- attitudes1
- campaign planning1
- campaigns1
- case studies1
- colleges1
- communication planning1
- conservation1
- economics of information1
- educational media1
- educational methods1
- environmental communication1
- ethnic factors1
- evaluation1
- experiential learning1
- food production1
- hydroponic1