Europe rural monitoring network

The peroxyacylnitrates were first identified in % as the primary cause of the undersurface glazing and bronzing on some broadleaved plants. PAN has since been implicated in numerous pollution episodes in southern California. Its importance in other metropolitan and rural areas in the United States and throughout the world is uncertain, although symptoms have been reported elsewhere. The reason is that oxidant concentrations in other parts of the world are much lower than those reported in California, and monitoring networks have not looked for PAN or its homologues. The report by Penkett et al. was the first to come from Europe. 

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