ANSWER: Wastewater
Explanation:
The World Toilet Day (WTD) is observed every year across the world on 19 November to raise awareness and inspire action to tackle the global sanitation crisis. The theme for year 2017 is Wastewater.
World Toilet Day is about inspiring action to tackle the global sanitation crisis. Observance of the day seeks to draw attention of people around world to raise global awareness of the daily struggle for proper sanitation which in fact is a human right along with clean water. It is coordinated by United Nations-Water in collaboration with Governments of member countries and relevant stakeholders.
