B
40-
30
Distance (km)
20
10
2
20
40
60
m
КМ
Time (min)
Yorbo
Answers
Answered by
1
Answer:
About 300 million years ago the earth had dense forests in low lying wetland areas. Due
to natural processes, like flooding, these forests got buried under the soil. As more soil
deposited over them, they were compressed. The temperature also rose as they sank
deeper and deeper. Under high pressure and high temperature, dead plants got slowly
converted to coal.
As coal contains mainly carbon, the slow process of conversion of dead vegetation into
coal is called carbonisation.
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