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Though valuable as methods of political education , Gandhi 's passive resistance campaigns were ineffective techniques of liberation . Application of compost reduces water run-off , and enables plant roots to penetrate deeper and soil to hold onto valuable nutrients . Dalmatian toadflax has no value as food , and crowds out valuable forage . Although vehicle break-ins in the UAE are rare , U.S. citizens are encouraged to ensure that unattended vehicles are locked and that valuables are not left out in plain sight . Notice that valuable pools will tend to not trade in a generic pricing structure ( exactly the Akerlof ( 1970 ) adverse selection problem , i.e ., valuable pools like valuable cars are not sold for a pooled price ) and will instead trade " on special " or an identifiable pool basis .