Figure 2.105 PCP/PCA ratios in pine needles collected in Canada (n=42) and Europe (n=283) for the period 1986–1994. Blue indicates predominance of PCP and red indicates predominance of PCA. Note that at the time of sampling, PCP was still used in Finland and much of continental Europe, but prohibited in Norway and Sweden. Despite the use in Finland, the PCA predominance is stronger in Norway and Sweden than in Finland, a pattern that is difficult to explain by long-range atmospheric transport of PCP from continental Europe. Maps courtesy of Hindrik Bouwman (North-West University, Potchefstroom, South Africa).