The management approach and its components GRI 103 103–3 Evaluation of the management approach 16–20 GRI 306 306–2 Waste by type and disposal method 18–19, 38 Waste disposed in metric tonnes as well as the percentage of waste going to landfill or being recycled, as either (1) third-party invoices recorded in environmental/utilities management systems or (2) based upon estimation methodology.