4. Roberta Soninno ("The New Geography of Food Security: Exploring the Potential of Urban Food Strategies") argues that "new urban food strategies" are needed to address food insecurity. What are some examples of "new urban food strategies" and how do they help address the issue of food insecurity? 5. Identify and describe some of the environmental impacts of industrial agriculture. 6. Provide a clear definition of sustainable development, and explain what this concept means. 7. Explain what the urban heat island effect is. What causes it and what are some examples of environmental changes that can help reduce it?