Economic equations relating population growth to resource use/environmental degradation

1. Drawing from the various readings (i.e. Robbins, Livi-Bacci), what are the strengths and limitations of economic equations relating population growth to resource use/environmental degradation? How can they be used thoughtfully and what do they reveal for us?
   2. Thinking about the complex relationship between population growth and natural resource use, what are the implications for the future health of the planet and well-being of its human population?