They are both able to be grown in very hot areas.
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Ferns
The steam engine needs coal, the coal comes from the coal mine
It is coal
The ferns have been compressed into 'coal' and we use coal as a source of energy - hence 'fossil fuels'.
How many ferns (that is a plural!) between the trees?If there are equal numbers of ferns in between each pair of trees: Five times as many ferns as between one pair.
they are all energy sources
Both are types of fuel (peat is found in bogs in the everglades for the U.S. and many places in England, so the must be dried out before burning.) even though ferns are called peat when they are burned.
A man is his sister's son's Uncle. A woman is her sister's son's Aunt .
Ferns and other plants that grew in swampy forests
the coal which we are using today was formed millions of years ago when giant ferns and swamps got buried under layers of earth. that's why coal is called buried sunshine.
the spelling