Priset på koldioxid

Miljöekonomen Richard Tol anför följande i ”The Economic Effects of Climate Change”, publicerad i Journal of Economic Perspectives:

tol

[C]limate change initially improves economic welfare. However, these benefits are sunk. Impacts would be predominantly negative later in the century. Global average impacts would be comparable to the welfare loss of a few percent of income, but substantially higher in poor countries. … There are over 200 estimates of the marginal damage cost of carbon dioxide emissions. The uncertainty about the social cost of carbon is large and right-skewed. For a standard discount rate, the expected value is $50/tC, which is much lower than the price of carbon in the European Union but much higher than the price of carbon elsewhere.

Möjligen kan det suboptimalt höga priset på koldioxidutsläpp i EU ses som bra mot ljuset av att andra, som USA, har suboptimalt låga priser. Men bör inte USA hjälpa till mer när det gäller att bära bördan av att bekämpa den globala uppvärmningen? Bör inte försök till påverkan av USA prioriteras av Fredrik Reinfeldt när Sverige blir ordförandeland i EU?