Despite the ambition to accomplish a plastic free ocean and the received recognition, the TOC project has received criticism as well. Van Franeker & Kühn (2018) reviewed the impact of TOC operations and concluded that if TOC indeed managed to clear half of the GPGP by 2025, it would only remove about 0.1% of the plastic that ends in the ocean every year. Likewise, many scientists stressed that the plastic sources reduction is in fact the most effective mitigation strategy (Rochman; Sherman & Sebille, 2016). Although TOC acknowledges source reduction as important, it does not see it as the solution to current ocean plastic pollution issues (TOC, 2015).
Furthermore, Sherman & Sebille (2016, p.2) declared that “ocean plastic removal might be more effective […] closer to shore than inside the plastic accumulation zones in the centers of the gyres”, like the GPGP. TOC, instead, focuses on ocean garbage patches in high seas gyres “because the plastic floating outside of these ocean garbage patches either naturally removes itself from the ocean by beaching onto a coastline, or eventually also ends up in an ocean garbage patch” (TOC, n.d.B).
To move beyond its first testing and 2015 prototype phase, TOC conducted a feasibility study. Costs were covered with a crowdfunding campaign that raised $100,000. The study included topics such as engineering, oceanology, ecology, maritime law, finance and recycling, and was conducted by a voluntary collaboration of more than a hundred private citizens, organizations and institutions (Slat et al., 2014). The favorable outcome illustrated the sustaining aspect of the innovation.
The positive media coverage that came with the favorable feasibility study was used for the second crowdfunding campaign. This campaign raised over 2 million dollars, becoming the most successful crowdfunding campaign opened by an NGO, so far (TOC, 2015; ABN AMRO, 2014). It allowed TOC to develop and test different prototypes in different locations (TOC, 2020A).
In late 2016 TOC initiated another fundraising round. In May 2017, it issued a press release stating that it “successfully raised 21.7 million USD in donations since last November [bringing TOC’s] total funding since 2013 to 31.5 million USD, [which enables TOC] to initiate large-scale trials of its cleanup technology in the Pacific Ocean” (TOC, 2017). The fact that this latter funding round comprised solely on donations demonstrates the legitimacy perceived by the initial investors that supported the project.
Eventually, after “hundreds of scale-model tests, a series of prototypes, research expeditions and multiple iterations”, a first full-scale clean-up system was ready in 2018 (TOC, 2018). The unique business approach of TOC, however, also created legal complications that had to be solved before the full-scale system could be launched. To overcome these hurdles, TOC signed a covenant with the Dutch Ministry of Infrastructure and Water Management (MIW, 2018). With an applicable legal framework and support from the Dutch government, TOC was ready to launch its first full-scale clean-up system. The aim of the operation was to test the system and collect relevant data while cleaning up the GPGP (TOC, 2018). Nevertheless, the operation was prematurely terminated because the system was not able to actually capture the plastic due to “an inconsistent speed difference between the system and the plastic” (TOC, 2020A, p.17). This led to a systematic failure (TOC, 2020A).
Thanks to a cooperation with two other organizations, TOC later came with an updated prototype, the “System 001/B”. After one year of testing, TOC stated on 3 October 2019 that its self-contained prototype succeeded in passively capturing and concentrating plastic from the GPGP using the natural forces of the ocean. This was the first true success since Boyan Slat presented his ideas in 2012 (TOC, 2019).
Additionally, TOC recycled the captured plastics into valuable goods: it turned them into sunglasses, a durable and useful product. This entrepreneurial activity is crucial to ensure future operations, as potential profit will be fully reinvested and, thus, completed the infinite circle (TOC, 2020B).
The adjustments in the prototype were incorporated in the newly designed system (002), that requires comprehensive examination and modelling before becoming the next full-scale clean-up system (TOC, 2020). Ultimately, “a fleet of systems” would be necessary to be able to clean up the entire GPGP and smaller plastic patches” (TOC, 2020A).
Furthermore, TOC is “looking to expand [its] operations all over the globe to help tackle the 1000 most polluting rivers, five years from the commencement of the scale-up phase” (TOC, 2020A, p.8). Replying to the criticism, TOC not only acknowledges plastic source reduction as important, but also strives for action.