. Author manuscript; available in PMC: 2023 Nov 18.

Published in final edited form as: One Earth. 2022 Nov 18;5(11):1286–1306. doi: 10.1016/j.oneear.2022.10.008

Table 5.

Boolean search strings used to return relevant literature and number of hits returned in all databases.

Search string	Hits in Google Scholar after the year 2015
(“plastic pollution”) AND (Corporat* OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	2340
(“plastic waste”) AND (Corporat* OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	6760
(“plastic” AND “recycl”) AND (Corporat OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	2590
(“ocean plastic”) AND (Corporat* OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	501
(microplastic) AND (Corporat OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	2410
(“plastic packaging”) AND (Corporat* OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	3350
(plastic* AND reduc) AND (Corporat OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	16600
(“plastic” AND (bag* OR bottle)) AND (Corporat* OR Transnational OR Multinational OR “Voluntary Commitment” OR Steward* OR Sustainable Development OR Circular Economy)	17100