In my community, which is relatively advanced in technology and with very dense population, some impact to the environment would be pollution and heat island effect.
Given the great demand of transportation, the vehicle density is high, leading to pollution by traffic. Citizens being more well-off, the amount of owned private cars also become an issue where these cars emit harmful substance to the environment from the exhausted gas such as sulphur dioxide and carbon monoxide.
In the city, given the human activities and the demand for housing, tall buildings are built for accommodation as well as roads for more convenient transportation. As these constructions are mostly built with a dark surface, they absorbed the radiation from sun hence trapping and emitting heat. This led to heat island effect, where the temperature of the community rises.
Hope it helps!
