To get a better overall scope of current publication trends on fertilizer recycling, recovery and sustainable fertilizer topics, a more general search query was used (See SI Methods: Broad Search). This query retrieved more than 120,000 patents and 125,000 journal publications over the 2001-2021 period. Patents saw an almost exponential increase until 2017, they then rapidly decreased (Fig. & See SI Fig. ), while journal publications continue increasing and have yet to reach a plateau (See SI Fig. ). Further analysis demonstrated that the patent publication trend of all countries (Fig 1 & See SI Fig. ) is highly influenced by the patent publications of China (Fig S2). This rapid publication increase and decrease of patents is not seen in the patent publication trends of the rest of the combined countries when excluding China (See SI Fig. ), instead journal publications seemed to be the focus compared to patents for the rest of the world. China's journal publications on the other hand seem to substantially lag behind its patent publications (See SI Fig. ) from 2001-2021.