In the first paragraph, what two images does the narrator juxtapose for contrast? What are the connotations of these juxtaposed images?

The narrator contrasts, the brown, crumbly dust of late summer with lush green lawns and paved streets under leafy shade trees. The connotations are of dry lifeless environment with an imagined lush green environment: one is stagnant and decaying and the other id growth and life.