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Green roofs help reduce the Urban Heat Island Effect, a condition in which urban environments absorb and trap heat. A green roof's plants remove air particulates, produce oxygen and provide shade. ... Another important benefit of green roofs is their ability to reduce and slow stormwater runoff in urban environments
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I believe photos would be the answer you're looking for.
It causes the reader to think that Cecily is a quick-witted person. Cecily was able to respond quickly with a counter argument, but that doesn’t mean that Cecily dislikes Algernon, that Algernon is funny or that Algernon is confused. (Algernon definitely isn’t confused since he was making a statement of how Cecily was his little cousin...meaning younger.)