I thought there was a hole in the ozone layer and thus too little ozone
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Can't we use the exceedance of ozone at ground level to fill the hole in the ozone layer?
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Which health effects are caused by high ozone values?
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Which precautions can I take to protect myself from high ozone concentrations
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Why are ozone concentrations higher in rural areas than in cities?
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What can I do myself to prevent high ozone concentrations?
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Are we on the right track, or is the ozone problem getting worse?
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Where does partiulate matter originate from?
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What is particulate matter composed of?
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