However, whereas an ecosystem relies on its decomposers for a complete recycling of its elements, the anthroposystem lacks such efficient decomposers and recyclers.
(an ecosystem; relies; on its decomposers for a complete recycling of its elements) (the anthroposystem; lacks; such efficient decomposers and recyclers)
an ecosystem the anthroposystem
relies lacks
on its decomposers for a complete recycling of its elements
such efficient decomposers and recyclers