Carbon pricing had a difficult first act. Introduced with great promise in the 1990s and 2000s, it struggled: prices were too low, coverage too narrow, and political support too fragile. By the 2010s, many commentators had written it off as a policy that could not work.
The obituary was premature. Carbon markets have returned — wider, more complex and embedded in trade policy in ways that would have been unthinkable a decade ago. The second act looks very different from the first, and it is being played on a much larger stage.
The trouble with the first act
Understanding the second act requires an honest account of why the first one stumbled.
The original carbon markets were designed to be elegant: put a price on emissions, let the market find the cheapest reductions. In practice, the price was often too low to change behavior, the permits were over-allocated, and the political economy of raising the price proved brutal. A policy that requires steadily increasing costs on voters is hard to sustain.
The lesson was not that carbon pricing is wrong; it was that a thin, fragile market cannot carry the weight. The second act has been designed with that lesson in mind.
The return in a stronger form
The new carbon markets are not a revival of the old design; they are a different animal.
Coverage has expanded from a few sectors to nearly the whole economy in some jurisdictions. The price has risen to levels that actually matter for investment decisions. And critically, the markets are being made more robust — with automatic adjustments, floor prices and mechanisms to prevent the oversupply that crippled the first version.
The result is a market that investors treat seriously, because it is serious: emissions allowances have become a real asset class, with real consequences for the cost of capital and the direction of investment.
The border dimension
The most consequential innovation of the second act is at the border.
Carbon markets are increasingly paired with border adjustments — taxes applied to imports based on the carbon embedded in them. The logic is simple: if your industry pays a carbon price at home, foreign competitors should not be able to undercut it by polluting for free. The mechanism extends the market’s discipline across the frontier.
This is a significant shift. Carbon policy is no longer a domestic matter; it is becoming part of trade policy, and it is reshaping how goods are priced in international markets. The politics of this are only beginning to be fought.
The price of inaction is now visible
The second act has also been helped by the visible cost of doing nothing.
As climate damages accumulate — in insurance, in disasters, in disrupted supply chains — the argument that carbon must carry a price has become harder to resist. The market that once seemed like an unnecessary cost now looks like an honest way of accounting for a cost that is already being paid. The debate has shifted from whether to price carbon to how.
This is the quiet strength of the new carbon markets: they are no longer a policy looking for a problem. They are a response to a problem that has become undeniable.
The risks of the second act
For all its strength, the second act carries risks that deserve attention.
The first is complexity. The new systems — with their adjustment mechanisms, border provisions and sectoral carve-outs — are so intricate that they invite gaming and litigation. The second is distribution. Carbon pricing falls hardest on energy-intensive goods and lower-income households, and the politics of compensation are unresolved. The third is fragmentation: different markets with different rules can distort trade and create incentives to shop for the weakest regime.
None of these risks is fatal, but all of them will shape how the second act plays out.
What companies should do
For companies, the new carbon markets are not a distant policy debate; they are a cost of doing business.
Wherever a carbon price exists, it affects the economics of energy use, materials and logistics. Where border adjustments exist, they affect the competitiveness of exports and imports. The companies that are preparing are the ones measuring their carbon exposure, pricing it into decisions and building the capacity to reduce it where the price is highest.
The companies that ignore the carbon price are, in effect, carrying a liability they have not counted. In a world where the price keeps rising, that is a position that only gets worse.
The verdict on the second act
Carbon markets will not solve the climate problem alone; no single instrument will. But their second act is a genuine improvement, and it reflects a hard-won lesson about how such policies survive.
The first act failed because it asked too little and promised too much. The second act asks more, pays attention to design and accepts that the politics will be continuous rather than settled. It is less elegant and more durable — which is exactly what the stakes require.
The market that was written off is back, and it is back to stay. The carbon market’s second act is broader, harder and more consequential than the first — and it is only going to get more so as the bills from the first act of the climate crisis continue to arrive.