Have the students make a poster to raise awareness about the issue of sewage. Split them into groups of 2 or 3 and have them pick three pieces of information that really stood out for them and that they felt other people should be aware of.
70% of the earth is covered by water but only 2% is drinkable, fresh water One litre of wastewater pollutes about eight litres of freshwater. There is an estimated 12,000 km³ of polluted fresh water worldwide
