Question

Traditional and Rooftop Gardens: Which detail from the passage Best supports the idea that green roofs can help cities decrease their power consumption? (Over 400 green roof projects are being developed in Chicago; Rooftop garden can improve air quality and reduce stormwater runoff; Energy costs at City Hall in Chicago decreased after a green roof was installed there)

Answer 1

The detail that best supports the idea that green roofs can help cities decrease their power consumption is: "Energy costs at City Hall in Chicago decreased after a green roof was installed there." This directly indicates that the installation of a green roof led to a reduction in energy costs, suggesting a decrease in power consumption.