The authors build their case on precedent. They name five existing conventions as the working model, among them the Montreal Protocol on ozone-depleting substances and the Minamata Convention on mercury compounds [8], and the account of their paper says those treaties succeeded because they collected data on the problem and tracked change over time [9]. That is a pattern across five agreements that all happen to carry reporting regimes. Nobody has run a mercury convention twice, once with measurement and once without, so the shared feature is a correlation with a plausible mechanism behind it, evidence that falls short of a measured effect. The mechanism itself is hard to argue with: Roland Geyer of UCSB puts it as the reason the Clean Air Act and Clean Water Act have teeth, which is that measurement comes first and the rule is written against what gets measured [10].
What that would require of parties is the part likely to decide whether such a clause survives. The program described covers the kinds of plastics produced, how they are traded, and how they are recycled or disposed of, and it obliges countries to standardize labeling, establish measurement practices and build repositories [6]. Douglas McCauley of UCSB grants the scale of the ask, calling it a bold idea to have all countries report detailed data on plastics from cradle to grave while insisting the design is borrowed rather than new [7]. This account leaves out what that infrastructure costs, and whether a reporting obligation is formally before the Geneva workshop at all remains unclear; the paper is described as informing the Sept. 16-17 meeting, not as text under a vote [17].
The U.N. Environment Assembly convened its negotiating committee in March 2022 [3], putting the workshop roughly four and a half years into the process [16]. Lead author Quanyin Tan of Tsinghua says the concern that data and reporting were not getting the attention they deserved grew as negotiations progressed [5], and Geyer's stated worry is narrower than the treaty as a whole: that the first version arrives with no reporting requirements [4].
The illustration the authors reach for is a plastic fork used for five minutes that can persist in a landfill for more than 500 years [13]. Run the arithmetic and the residence time is about 52 million times the service life [14], which is a vivid figure and also a reminder of how coarse the available numbers are. The quantities actually in dispute are more mundane than landfill lifetimes: annual production, the chemicals used, trade flows, waste generated, and where that waste ends up. Geyer's fallback argument is that parties unable to agree on how much plastic the world should make might still agree it would be useful to know [11]. Whatever they do agree to, the tracking system has to exist before anyone can say whether it worked [12].
