See the charts here: https://www.ieltsessaybank.com/the-graph-and-table-below-give-information-about-water-use-worldwide/

Nowadays many people complain that they have difficulties getting enough sleep. What problems can lack of sleep cause? What can be done about lack of sleep?   Sample essay: https://www.ieltsessaybank.com/nowadays-many-people-complain-that-they-have-difficulties-getting-enough-sleep/