What causes the “heat island” effect? a. heat produced from a large number of people b. the materials used in building cities retain heat c. the large amount of reflected light from glass windows d. all of the above

The correct answer is (B)

The materials used in building cities retain heat

Heat islands is a phenomenon which states that inside urban areas significantly more heat is absorbed and retained than as compared to surrounding areas. Heat can be produced by burning fossil fuels or any other hydrocarbons. Burning fuel inside houses, vehicles and terrains is the main reason for making the temperature of cities higher as compared to barren lands.

b.

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myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.