Add and simplify 4/9 + 3/7 Question 2 options: 7/16 55/63 12/63 3/12

Compare and contrast the environmental consequences of reliance on coal with reliance on petroleum.

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.

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