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GCSE Exam GCSE Environmental Science
3.6.3.1 Linear human systems lead to resource depletion and waste generation
3.6.3.2 Natural processes often link together in sequences that create cycles, with the waste products of one process being the raw materials for other processes
3.6.3.3 Natural waste products are either non-toxic or do not build up to cause toxicity
3.6.3.4 The circular economy