I believe that some long term effects from air pollution, are heart disease, lung cancer. Air pollution can cause long-term damage to people's nerves, brain, kidneys, liver, and other organs. I'm not sure what the short term effects are. Hope this helps =)
It is also called the real density and is a measured by the total number of people divided by the total land area.
While the population density is the measurement of the population per unit of area or unit volume and is frequently used to a living organism and is a key variable to measure of the population characteristics and pattern.
