Monitoring atmospheric pollution. A researcher tending an 'active fog collector',an instrument used to monitor atmospheric pollution. When the device senses the presence of fog,it automatically takes a sample. The sample may then be analysed for oxides of nitrogen and sulphur (the 'acid rain' chemicals) and ammonia. The researcher is Hans Hultberg of the Swedish Environmental Research Institute | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bond, Martin |
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