Writing Task - Sample 5: Process (Band 7) The diagram reveals a long process in which rainwater is contained, treated and reused for domestic purposes The process starts with rains brought by clouds which provide water for natural lakes, pools or artificial reservoirs likes dams At the same time, rain water is collected into tanks from gutters, then is used directly by people without any treatment Water in dams, however, must be filtered and made clean at water treatment plants to become drinking water before being delivered to people’s homes for daily usage The next step is treating waste water, the output of domestic consumption This type of water is collected from people’s houses to waste water treatment plant, where it is turned to recycled water and flowed back to houses, while the excess treated water is released to river Also, any storm water must be passed through the storm water treatment before running to its clean, natural state To conclude, the diagram may well reflect the steps by which rainwater is reused With two steps of treatment applied, water is made clean before being provided to people’s usage and released to natural environment