Causes of Rising Temperatures in Dhaka

 There are a few potential reasons why the city of Dhaka in Bangladesh is experiencing rising temperatures and getting hotter:

1. Urban heat island effect: As cities grow and urbanize with more buildings, roads, and infrastructure replacing vegetation and open spaces, they tend to absorb and trap more heat from the sun's rays. This creates an "urban heat island" where city temperatures are higher than surrounding rural areas.
2. Global warming: Like many places around the world, Dhaka is experiencing impacts from global climate change driven by increasing greenhouse gas emissions from human activities. Average temperatures are rising over time.
3. Deforestation: The clearing of trees and forests around Dhaka for urban expansion and development removes natural vegetation that would otherwise help cool the local environment through shade and evapotranspiration.
4. Air pollution: High levels of particulate matter and other pollutants in Dhaka's air can absorb and trap more of the sun's heat radiation.
5. Construction materials: Widespread use of concrete, asphalt, and other heat-absorbing materials in Dhaka's buildings and infrastructure exacerbates the urban heat island effect.
6. Lack of green spaces: Limited parks, gardens, and other green areas in the densely populated city provide little respite from rising temperatures through shading and evaporative cooling effects.

A combination of urbanization, environmental degradation, air pollution and climate change factors are likely all contributing to making Dhaka's temperatures increase over time compared to the past. Mitigation efforts are needed to address this challenge.