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Due to the environmental impact of CO2 emissions, scientists are exploring ways to make fertilizer manufacturing more sustainable. This scientific journal review analyzes the scientific and patent trends on sustainable fertilizers from 2001 through 2021 from the CAS Content CollectionTM. This bibliometric study and literature evaluation will help scientists identify and use new fertilizers and nutrient sources to augment existing ones, while also increasing the effectiveness and sustainability of waste management and ammonia production.