One hundreds years ago in London, England the people burnt coal in factories and houses. This caused the air to be polluted with soot and smog. London-type smog forms when particles in coal smoke combine with water droplets in humid air. Today people in London burn alot less coal, therefore the air in London is much cleaner than one hundred years ago.
1 comment:
I liked your word choice. And how you explained what London was like a hundred years ago. I also liked your liked your picture too.
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