Model City: When I was studying my 10th standard, I was asked to participate in a science exibition. We chose to create a Model City, which conserves water and energy in many ways. The model had the following features or parts: 1. A house that collects the rain water and stores it in a water tank. 2. The house also consists of a miniature windmill to generate current for its own use. 3. A cultivation land that has a layer of polyethene sheet to reduce the amount of water lost by land obsorption. 4. A miniature sewage treatment plant to purify the sewage water to use in cultivation fields. Initially we created this model as a static model and then, we decided to convert it into a working model. Hence, we created the roof of the house building into a water proof compartment. Then connecting the outlet pipes to the watertank below was straight forward.
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