ENAn emission intensity is the average emission rate of a given pollutant from a given source relative to the intensity of a specific activity; for example gra...
ENEmissions trading or cap and trade is a government-mandated, market-based approach to controlling pollution by providing economic incentives for achieving re...
ENThe excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain in...