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The industrial revolution in England (the black smoke form all the factory chimneys) produced allot of environmental pollution and the trees in the worst affected areas were covered in soot. Now thankfully this pollution has ceased and the tree trunks are no longer black...I understand that the areas of black peppered moth variants are now reverting to the light colored variety.

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15y ago
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13y ago

I don't know about England, but in America, trees' bark changed colour because, during the Industrial Revolution, so much coal was being released in to the atmosphere that it was causing discolouration in the bark. This also meant that the animals living there, specifically the moths that camouflaged with the pale white bark became easier to find and eat. The few black moths that were around at the time flourished, and the population of the moths increased drastically. Hope this answers your question!

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10y ago

The pollution from the Industrial Revolution darkening the trees.

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Q: Why happened in England that changed the bark on the trees light to dark?
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