Env.Managment Help !!

I

igcse2011

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1) Strategies for soil conservation-dry land farming & wind breaks.
2) sustainable forest managment techniques ?
3)Brief explaination on demographic transition and its limitations ?
4) North-South trade in commodities, cash crops vs food crops ?
5)Advantage & disadvantage of Green Revolution


HELP PLEASE , EXAM TMORROW !!! :O:
 
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