Methyl Bromide and Stratospheric Ozone Depletion
Bibliographic record
Abstract
Methyl Bromide (MeBr), a widely used pesticide in agriculture, is regulated for its potential ozone-depleting effects in the Earth's stratosphere.Controls on production, emissions, and trade are mandated internationally under the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer (the Protocol) and domestically under Title VI of the U.S. Clean Air Act.A ban on production for nonessential uses occurred on December 31, 2004, but the Protocol still regulates post-2004 production for critical uses.U.S. agribusinesses have sought exemptions from the Environmental Protection Agency (EPA) to produce MeBr for certain critical uses after the ban.Exemptions are resisted by some Protocol parties and environmental advocates who seek a rapid, definitive ban on production and use.Chemical companies maintain that they cannot foresee development of effective chemical substitutes for all uses of MeBr in the near term, and agricultural producers indicate they may have to rely on less economical and less effective treatments.Production allowances for MeBr for 2005-2008 have since been approved under the Protocol, and the EPA has approved allocations for registered U.S. users.Due to declining production of manufactured MeBr, the EPA would permit commercial trade of pre-2005 inventories.This report will be updated as warranted.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".