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Lesson 21. Environmental problems
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This lesson discusses environmental pollution, the importance of clean air and water, and the harmful effects of pollution on humans, animals, and plants
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#environment#health#water#animals#pollution#clean air
Premium Content
Lesson 21. Environmental problems
2,500so'm
Betlar soni
3 taFayl hajmi
20.49 KBFayl turi
.docx
✓
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