Fig. 4: Toxic substances at contaminated sites in the permafrost dominated regions of Alaska. | Nature Communications

Fig. 4: Toxic substances at contaminated sites in the permafrost dominated regions of Alaska.

From: Thawing permafrost poses environmental threat to thousands of sites with legacy industrial contamination

Fig. 4: Toxic substances at contaminated sites in the permafrost dominated regions of Alaska.

The stacked bar plot depicts the relative occurrence of the most common toxic substances found at contaminated sites in permafrost dominated regions of Alaska (based on 22), as reported by the Contaminated Sites Program (CSP). The occurrence is further differentiated by industry sector: Industrial Processes and Product Use (IPPU), Energy, Military, and Waste. Toxic substances from Agriculture, Forestry, and Other Land Use (AFOLU) occur in negligible numbers. The toxicity of each substance is indicated using the median lethal concentration for fish (LC50-fish) after 96 h (see also Supplementary Table 1).

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