The carbon in coal is effectively withdrawn from the cycle for very long periods of time and remains trapped within sedimentary rocks until it is exposed by erosion or by mining.
(The carbon in coal; is effectively withdrawn; from the cycle; T:for very long periods of time) (The carbon in coal; remains; trapped within sedimentary rocks; T:until it is exposed by erosion or by mining) (it; is exposed; by erosion or by mining)
The carbon in coal The carbon in coal it
is effectively withdrawn remains is exposed
from the cycle T:for very long periods of time
trapped within sedimentary rocks T:until it is exposed by erosion or by mining
by erosion or by mining