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- When factories and power plants burn fossil fuels like coal and gas, a dark, sticky, powder-like substance is released*^*into the environment.
Question 1:
When factories and power plants burn fossil fuels like coal and gas, a dark, sticky, powder-like substance is released*^*into the environment. It's mostly made up of carbon elements and is called ........ People first began to notice this*^*during the Industrial Revolution that took place in Europe. A. flour
B. dirt
C. soot
D. _
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