In our locality, the drainage system includes pipes and drains. In the lesson, it is mentioned that irrigation projects/things that were built during the time (which we have studied in the chapter) include ring wells and drains. Comparison: Similarities. I live in a city. Our locality has a good drainage system. Every individual house or building also has a good drainage system. Archaeologists have also found some drains and garbage dumps in each of the city/town or site mentioned in the chapter and in an individual house. Differences or Dissimilarities. Nowadays, everything (project or work) is well- maintained and made up of good raw materials. But in early cities mud bricks and thatch had been used which might not have been survived long. We use separator and filters with modem technology which was not there earlier