Combustion is another practice that has helped reduce the amount of landfill space needed.
(Combustion; is; another practice that has helped reduce the amount of landfill space) (landfill space; needed; ) (another practice; has helped; reduce the amount of landfill space) Context(another practice has helped,List([14, 46))):(another practice; has helped reduce; the amount of landfill space)
another practice has helped,List([14, 46))
Combustion landfill space another practice another practice
is needed has helped has helped reduce
another practice that has helped reduce the amount of landfill space
reduce the amount of landfill space
the amount of landfill space