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Miembro desde hace
3 years 7 monthsEdad: 9-14
Level: 9
Idioma: English
(en)
ID: 967756
03/05/2021
Country code: AE
Country: United Arab Emirates
Tema principal: Air poolution (1365750)
From worksheet author:
Think about what you have learned about air pollution. Do you think that most air pollution comes from natural sources or human activities?
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