admist the ever increasing air pollution and constant pressure of population on land,we might face scarcity of clean air in the future. a future were oxygen could be sold for living. design an advertisement to sell oxygen
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“Oxygen for sale”
Give carbon di oxide and take oxygen for 1000 bucks.
Get 10 plant saplings free, free, free!
The sale ends by the month end.
Hurry up!
Else, you will die sooner.
Plant more trees to get more oxygen, else you will have to rely on the lab production.
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