Question

urban heat islands such as roads, buildings and other infrastructure tend to absorb and re - emit more heat than do natural landscapes. hence, cities can create \heat islands\ of higher temperatures relative to greener, less developed outlying areas. residents of urban heat islands (uhi) tend to use more air - conditioning than residents of suburban and rural areas, thereby consuming more energy and disproportionately contributing to air pollution. to mitigate these effects, many urban communities are exploring natural cooling solutions, such as green roofs - vegetation layers grown on roof surfaces that both absorb air pollutants and reduce the temperature of the roof surface and surrounding air. which choice best states the main idea of the text? choose 1 answer: the relatively high temperatures of urban heat islands lead to increased energy consumption and pollution, so many urban communities are considering natural cooling solutions. the primary cause of urban heat islands is the lack of vegetation in cities, which can be easily remedied by planting more trees and creating new communal green spaces, such as green roofs. urban heat islands are cities that experience higher temperatures relative to surrounding rural areas, as human - made structures like roads and buildings tend to absorb and re - emit more heat than do natural landscapes. green roofs have become increasingly popular in cities, as they offer a natural solution to both the increased air pollution and the seemingly high temperatures of urban areas.

Explanation:

The passage first describes urban heat - island effects like higher temperatures, increased energy use and pollution. Then it mentions natural cooling solutions (green roofs) that urban communities are exploring. Option A best sums this up.

Answer:

A. The relatively high temperatures of urban heat islands lead to increased energy consumption and pollution, so many urban societies are considering natural cooling solutions.