ess

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