Fig. 1: Schematic diagram of the four sources of emissions that apply directly to both upstream and downstream petrochemical production. | Nature Chemical Engineering

Fig. 1: Schematic diagram of the four sources of emissions that apply directly to both upstream and downstream petrochemical production.

From: Reducing uncertainties in greenhouse gas emissions from chemical production

Fig. 1

Upstream products are used as input materials both for other types of upstream product and for downstream products as depicted by the black arrows. A collapsed version of this diagram is used as a key for other figures. See Supplementary Section 1.1 for product aggregation into groups.

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