Environmental Engineering Reference
In-Depth Information
been achieved in Scandinavia, where over 3000 lakes have been limed. Reduced acidity is
followed by recovery of the biota; lower organisms reappear first, succeeded by amphibians
and fish. Further liming has to take place every few years as long as the acid rain input
continues.
Acid rain is a complex problem which is likely to remain as long as the atmosphere is
polluted. It is an international problem; the areas affected are not necessarily the source of the
pollution. As with the enhanced greenhouse effect, we are still not certain in detail about the
processes at work and hence prediction is difficult.
