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MAKE A MEME View Large Image Alder showing ozone discolouration.jpg Red alder leaf showing discolouration caused by ozone pollution http //earthobservatory nasa gov/Library/OzoneWx/ Pat Temple U S Forest Service PD-USGov Ozone Alnus rubra

Alder showing ozone discolouration.jpg Red alder leaf showing discolouration caused by ozone pollution http //earthobservatory nasa gov/Library/OzoneWx/ Pat Temple U S Forest Service PD-USGov Ozone Alnus rubra

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Keywords: Alder showing ozone discolouration.jpg Red alder leaf showing discolouration caused by ozone pollution http //earthobservatory nasa gov/Library/OzoneWx/ Pat Temple U S Forest Service PD-USGov Ozone Alnus rubra