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The NatChem database from Environment Canada contains the best long-term atmospheric monitoring data that exists for Canada, similar to the National Atmospheric Deposition Program (NADP) in the US. Unlike the NADP, the distribution format associated with NatChem data is a hideous export format that looks like it was used by SAS at one point. readLines("natchem_sample.CSV", n=6) ## [1] "*DATA EXCHANGE STANDARD VERSION,NATCHEM PRECIP 2003/01/17 (1.01),,,,,,,,," ## [2] "*COMMENT,For information on this file please see the NAtChem web site http://www.