Plants took over the land and became so abundant that the first coal deposits formed in the tropical swamps that covered much of the Canadian Arctic Islands, northern Greenland, and Scandinavia.
(Plants; took over; the land) (Plants; became; so abundant) (the first coal deposits; formed; L:in the tropical swamps) (the tropical swamps; covered; much of the Canadian Arctic Islands, northern Greenland, and Scandinavia)
Plants Plants the first coal deposits the tropical swamps
took over became formed covered
the land
so abundant
L:in the tropical swamps
much of the Canadian Arctic Islands, northern Greenland, and Scandinavia