this is the last part of NCERT BOOK of science WASTEWATER STORY CLASS 7

1. How to be an active citizen!
Better Housekeeping
Practices!
Sanitation and Disease!

2. What would you do to
become an active citizen?

3. How to be an active citizen?
We often get annoyed by the awful smell of open drains. This
doesn’t only lead to disgusting smell but also lead to breeding of
flies, bacteria, mosquitoes etc. This can then result as people
falling sick with diseases like dengue, malaria etc.
You should approach the municipality or the gram panchayat and
inform them about this problem and insist them to cover all the
drains. You should also spread awareness through your
neighborhood about not wasting water as it’s a precious source.
If the sewage of any particular house makes the neighborhood
dirty. We should request them to be more considerate about
other’s health.

4. This guy cleaned the whole lake alone
When scientist Marino Morikawa learned that the Cascajo
Wetlands (El Cascajo) he remembered from his childhood had
gotten dramatically polluted, he gave up his research work
in Japan and came back to Peru. When Marino saw the wetlands
with his own eyes, 20 years after his last visit, it looked like
“an oxidation pond.” Holding a PhD in Bio industrial Science,
Marino used all his knowledge in water quality control to invent
a new technology that could help him clean El Cascajo.
He took his personal savings, borrowed money from several
banks, and started his work on this technology that worked
wonders.

5. Have you seen your mom throw tea
leaves in the drains instead of dustbin?
You know why not?

6. Better House Keeping Practices
Things like oil, fats, tealeaves, solid food
remains, cottons, sanitary towels etc. Should be
thrown in dustbins and not in the drains as they
choke the drain pipes. They don’t allow free flow
of oxygen. This hampers the degradation
process. Chemicals like paints, solvents,
insecticides, motor oil , medicines etc. may kill
the microbes that helps in purification of water.

8. Sanitisation and diseases
Contaminated water and poor sanitation
practices are the major causes of the large
number of cases of waterborne disease. A very
large economically defecate in the open, on dry
river beige on railway tracks, near field and
many a times directly in water bodies. Untreated
human excreta is a health hazard which causes
soil pollution and water pollution also.
https://youtu.be/Ac_1--sMP6k

10. Presentation by:
• Krishiv Parmar
• Moksh Pandya
• Shaurya Panghal
• Anshuman Joshi