Green Warrior Class 5 Sustainable Cities and Communities

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

In many big cities, the temperature is often 3 to 5 degrees higher than in the nearby countryside. This is called the "Urban Heat Island" effect. What is the main cause of this?

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A There are too many people breathing in a small space.
B Concrete and asphalt (roads) absorb sun heat during the day and release it at night.
C Skyscrapers are closer to the sun, so they get hotter.
D City lights are left on all night, which warms the air.

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Answer: B. Concrete and asphalt (roads) absorb sun heat during the day and release it at night.

Answer: (B)
Simple Explanation: Cities are full of dark roads and hard buildings that "soak up" heat like a sponge. In the countryside, trees and grass keep the ground cool, but in cities, the heat stays trapped in the concrete.

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In many big cities, the temperature is often 3 to 5 degrees higher than in the nearby countryside. This is called the "Urban Heat Island" effect. What is the main cause of this?

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