The temperature in a city is higher than that in a village because of various factors and reasons:
- Presence of buildings and other structures- While rural areas tend to have less vegetation, they also have a lot more open sky above them, which allows the sun's rays to bounce off the ground and heat up surfaces. Cities are enclosed by walls and buildings, so they don't have as much available surface area to absorb sunlight like rural areas do.
- Urban heat island effect- Urban areas are often covered with buildings, roads and other structures that absorb sunlight and heat up the surrounding air. The urban heat island effect is due to human activity. Buildings, roads and other structures all trap heat and prevent it from escaping through natural means such as evaporation or radiation. This can lead to increased temperatures that can differ greatly from those of surrounding rural areas because of differences in topography or climate between them.
- Population Density- The higher the population density, the greater the heat absorption by people. The more people there are, the more heat energy they emit through their bodies. This is why cities are hotter than rural areas. The higher the temperature in cities, the greater the number of people who can be kept alive there. The greater their number, the less food and water will be needed to sustain them all. This is why cities are colder than rural areas.
- Oxygen & Carbon di oxide level- The temperature of the air at ground level varies according to the altitude. As we go up in elevation, the amount of carbon dioxide in the air decreases and the amount of oxygen increases. This has an effect on our bodies, making us feel colder. The same effect occurs when we travel from cities to villages or vice versa. The higher up you go from a city, the lower the relative humidity (RH) will be due to less carbon dioxide and more oxygen in the air. This means that the temperature will drop as well.
In another opinion, The temperature in a city is higher than that in a village because of two factors:
1) The amount of people living in a city.
2) The amount of vegetation.
In order to understand why these two factors are important, we first need to look at how our body regulates its temperature.
Our body regulates its temperature by using two main methods: sweating and shivering. Sweating cools us down by evaporating water from our skin—an expensive process that requires energy, so it's only done when necessary (i.e., when there's too much heat coming off our bodies). Shivering uses the same principle as sweating, but instead of evaporating water from our skin, it uses muscular contractions to help cool ourselves off by causing more movement—an inexpensive process that doesn't require energy. However, if we're exposed to high temperatures for long periods of time, we may become dehydrated because our body can't get rid of all the water it needs through sweating or shivering alone. That's why cities tend to be warmer than villages: there are more people living in them who generate more heat and sweat than those who live in rural areas.