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The 3rs role in keeping environment safe are: Less use of some thing enhances energy sources. Use things again and again also saves energy and make new things from old ones make environment clean.

https://teachingstyles.net/2026/01/19/with-out-hands-on-activities-in-the-class-room-is-same-as-with-out-medicine-a-patient-get-well/

https://teachingstyles.net/2026/01/19/with-out-hands-on-activities-in-the-class-room-is-same-as-with-out-medicine-a-patient-get-well/#8230

By Chinese proverb when I hear I forget when I see I remember and when I do I understand. What a fun by arranging such a fruitful class.