John Evelyn and London Air

In the relatively clean air of London today, many Londoners might not suspect that for centuries their city was known for its polluted air. Though the problem was an old one, it was not until the Clean Air Act of 1956 that positive steps were taken to eliminate the major source of air pollution: coal-burning fires. Approximately 300 years earlier, however, John Evelyn, the diarist, vividly described and condemned air pollution and proposed a solution that would have accomplished some of the goals of the 1956 act. Evelyn correctly identified the cause of pollution; but his proposal was far more drastic than the modern solution, and was based on an apparently erroneous assumption that commercial, rather than domestic, fires were the chief cause of dirty air. In the seventeenth century, of course, the distinction between commercial and domestic fires was not so clear as it is today, since most shop-owners and craftsmen lived in the same buildings with their shops.