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In the Class 7 NCERT Science book “Science”, the chapter “Wastewater Story” helps you understand what happens to water after it is used in homes, schools, and industries. You learn about wastewater, sewage, and how improper disposal can lead to water pollution.
As you explore this chapter, you study the process of wastewater treatment in sewage treatment plants. You also understand the important role of microorganisms in cleaning water and making it safe before it is released back into the environment.
This chapter encourages you to maintain hygiene and use water responsibly. Through examples and explanations, you develop awareness about sanitation and understand how proper wastewater management helps protect health and the environment.
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Science