Does acid rain directly influence plant growth? Some comments and observations

Acid rain has been implicated as being directly phytotoxic. A review of the experimental evidence was conducted. Although there are several mechanisms by which acid rain could influence plant growth, the evidence suggests that plants are probably not being directly affected by ambient acid rain. Rain acidity may affect soils with poor buffering capabilities and thus indirectly influence plant growth in some regions. Factors other than rain acidity may be responsible for the reported reductions in forest growth in North America and Europe.