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biochemical oxygen demand
a measure of the amount of dissolved oxygen required to break down the organic material in a given volume of water through aerobic biological activity
natural capital
economic value of natural resources
pollution management strategies
altering human activity, regulating pollutant emissions, catalytic converters, regulating fuel quality, adopting clean up measures
effects of acid deposition
direct effect i.e. acid on trees, indirect toxic effect i.e. solubility of metal, indirect nutrient effect i.e. leaching nutrients
Note 
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