Homework 2-environmental systems and ther inteatoh environmentol sclence: earth as a living planet, 9th ed.-chapters 4 and 5 1. explain the phrase dynamic equilibrium. why is the idea of equilbrium in systems somewhat misleading in regard to environmental questions? provide an example of the average residence time (art) of a pollutant in the environment, and describe how knowing the art is important in protecting humans or other organisms. 2. what is the difference between positive feedback and negative feedback in environmental systems? provide one example of each type of feedback for the environment. 3. 4. what is the main concern with exponential growth patterns for organisms, such as humans?