Problem 1: Explain how two human developments have enabled the expansion of carrying capacity on earth for our species.
Problem 2: Explain how population, affluence and technology contribute to human environmental impact (I=PAT).
Problem 3: In terms of the I-PAT concept, you count as just one person among all the other people that compose the human population. But can you identify two or three ways in which consumption in your daily life might differentiate your contribution to environmental impact from those of other people on Earth? Describe some steps you could take to reduce your impact.