Sweden's Carbon Tax — proof that growth can decouple from emissions

Sweden introduced a carbon tax in 1991 and has steadily raised it to one of the highest carbon prices in the world (well above US$100 per tonne). Over the decades since, Swedish emissions fell substantially while GDP kept growing — concrete, real-world evidence that economic growth can be decoupled from carbon emissions.

A tax per tonne of CO₂ raises private cost toward social cost — shifting marginal private cost toward marginal social cost — and cuts polluting output toward the social optimum, shrinking the welfare loss. Its key advantage over regulation: the price signal lets the market find the cheapest way to abate, rather than a regulator dictating how.

For — efficient (the market finds the cheapest abatement), it raises revenue, sends a strong price signal, and demonstrates real decoupling. Against — competitiveness and carbon-leakage risk (firms may relocate to avoid it); regressive without rebates; energy demand is often inelastic in the short run; and setting the "right" price is politically hard.

Sustainability questions are easy to answer vaguely. Sweden lets you make a specific, evidenced argument — a real country where a market-based policy cut emissions without sacrificing growth — and then evaluate its limits. Specific beats general every time in the mark scheme.