Chapter 8 of 12
Revision Notes
Environmental Life Style — Revision Notes
Maharashtra Board · Class 10 · Water Security
Environmental Life Style revision notes for Maharashtra Board Class 10 Water Security: 4 topics in quick points.
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Key Topics to Revise
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1. Earth Overshoot Day and the pressure on nature
- Earth Overshoot Day means the day when human consumption of natural resources for the year exceeds what nature can regenerate in that year.
- The Earth Overshoot Day for 2019 was 27 July 2019.
- This shows that resources created in 2019 were finished by 27 July 2019 only.
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2. Daily habits that pollute water
- Toothpaste used for brushing contains phosphate, carbonate, fragrance and multi-colour chemicals amounting to 2-5 grams.
- Shaving uses up to 2-5 grams of sulphate, carbonate, stearic acid, ethanol, amine, fragrance chemicals.
- Soap used while bathing contains 6-10 grams of edible oils, aromatic chemicals, dyes, sulphates, carbonates, sodium, detergents.
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3. Household wastewater and water saving calculations
- The amount of wastewater generated after use is more than 75-80% of the water used.
- If this wastewater is purified, that much water can be recovered for reuse.
- A housing society of 100 flats with 5 people each using 20 litres for bathing needs 10,000 litres per day for bathing water.
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4. Sewage, treatment plants, and the correct treatment method
- Domestic sewage comes from bathroom, kitchen sinks, toilets, and wash basins.
- Domestic sewage has mild pollutants such as drainage dirt, rotten food, vegetables, and soap foam with negligible chemicals or metal.
- Factory sewage contains chemicals, metal particles, machine oils, and lubricants, so it has heavier pollution.
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Full NotesKey Concepts
This is the day when humanToothpasteToothpaste contains 2 to 5 gramsThe population is around 50 lakhsRainwater is green water
Frequently Asked Questions
What are the important topics in Environmental Life Style for Maharashtra Board Class 10 Water Security?
Key topics in Environmental Life Style include Earth Overshoot Day and the pressure on nature, Daily habits that pollute water, Household wastewater and water saving calculations, Sewage, treatment plants, and the correct treatment method. Study these first, then practise questions on each for the Maharashtra Board Class 10 board exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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