Final answer:
The haze that Harrison Ford encounters in Indonesia is a type of air pollution caused by smog and dust. It is a serious health hazard in many big cities around the world.
Step-by-step explanation:
The haze that appears when Harrison Ford arrives in Indonesia is not actually smog, but rather a type of air pollution caused by a thick layer of smog and dust. This haze is a serious health hazard for people living in many big cities around the globe, such as Singapore, where pollution levels are high. Smog is one example of air pollution, and it is caused by the combination of smoke and fog, hence the term.