Why is it in news?
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In a recent survey of urban beehives around Vancouver, published recently in Nature Sustainability , showed that the hives’ honey contained minute levels of lead, especially downtown and near the city’s port.
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The readings suggest that honey can be a sensitive indicator of air quality.
More in news
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Other natural pollution indicators:(1) Tree rings can tell scientists what the atmosphere was like when the tree was young.(2) Lichens can reveal local air pollution levels.
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Way forward: Scientists may be able to track improvements or declines in air quality by monitoring the beehives and analysing the honey.
Source
The Hindu