Evidence is adduced to show the problem of acidic rain which, though sometimes natural in origin, is usually intensified by man-made atmospheric pollutants. Examples of intensities and sources are described, mainly in relation to experience in eastern Canada. Environmental consequences, sample studies of which are reviewed, are less-than-adequately understood. The long-term solution is abatement
... [Show full abstract] of man-made sources of pollution; it is costly.-D. A. Lewis