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Renewal of the Earth’s atmosphere

Free radicals and air quality

Our atmosphere removes toxic gases and cleans the air we breathe using some important free radicals that exist in miniscule amounts

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This article links to the following topics in the AQA, Edexcel, OCR, WJEC, CCEA, SQA and IB Diploma exam specifications:

■ climate change

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Previous

Titanium dioxide

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Chemistry crossword

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