The following are two filter systems. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The flow chart presents two different processes for making water safe for domestic use. Overall, the first process, known as the Cross-section filter, consists of three filtration stages. In contrast, the second process is simpler, involving just two steps, and is typically used in outdoor settings. Looking in more detail at the Cross-section filter, untreated […]