Storyclover
Storyclover
On a clear summer morning, Mina crouched beside a city sidewalk and pressed the tip of her thermometer against a sun-warmed paving stone. She had one question to answer before the day was over: why did the city feel hotter than the countryside?
Why Do Cities Feel Hotter Than the Countryside?Concrete, asphalt, traffic, and fewer plants trap and release heat differently, creating urban heat islands.
1. On a clear summer morning, Mina crouched beside a city sidewalk and pressed the tip of her thermometer against a sun-warmed paving stone. She had one question to answer before the day was over: why did the city feel hotter than the countryside?
2. A few steps away, a patch of grass lay beneath a young tree. Mina measured it, then measured the pavement again. The grass was cooler, and the tree’s shade made the air feel gentler against her face.
3. By noon, the street had become a bright canyon of concrete and asphalt. The buildings held the sunlight against their walls, and the cars and buses added warmth of their own. Mina wrote down every clue without stepping into the busy road.
4. After lunch, Mina took a train beyond the last row of buildings. The city’s hard edges gave way to fields, hedges, and long stretches of green. She carried her question with her, along with the clues she had gathered.
5. When Mina reached the countryside, she checked the air above the grass and then the air above the pale stone lane. The grass felt cooler, even though both places had been warmed by the same sun. Here, plants covered the ground instead of leaving it bare.
6. Under a broad oak, Mina noticed that the leaves did more than block the sun. Plants release tiny amounts of water into the air, which helps cool the air around them. She added that clue to the others in her notebook.
7. When Mina returned to the city at dusk, she tested the pavement once more. The grass had cooled quickly, but the concrete steps and asphalt still gave back much of the day’s heat. The city was holding on to the sunlight after the sun had gone low.
8. At home, Mina sorted her observations into three groups. Concrete and asphalt absorbed and stored the sun’s heat, traffic added extra heat, and plants shaded the ground while releasing water into the air. The answer was finally beginning to fit together.
9. Mina closed her notebook and looked from the cool garden to the warm streets beyond it. Concrete, asphalt, traffic, and fewer plants trap and release heat differently, creating urban heat islands.
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