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- General Information
- Blue Environment Zones in Germany
- FAQ – Frequent Asked Questions
- Who will get the Blue Badge?
- Who claims for the Blue Badge?
- The Source of Nitrogen Oxide
- Exceeding the Limit Values
- What and which way damages are caused by nitrogen dioxide
- Nitrogen dioxide in the environmental zone
- Biggest NOx Polluters
- Politics and the nitrogen problem
- Lawsuits against NOx pollution
- NO₂-values in Germany
- Background information
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