A proportionate response to Trump’s climate plans

During the US election campaign, Donald Trump said that he would dismantle the country’s domestic climate change policies, and withdraw the US from international climate agreements, most notably the Paris agreement which came into force earlier this month. In the week since he became President-Elect, he has given every indication that he is serious in his intentions.

So how should the rest of the world respond? It is tempting to indulge in wailing and gnashing of teeth, but in the real world of a Trump Presidency, this is unlikely to be effective. What is needed is a proportionate response. In France, Nicolas Sarkozy has proposed what may well be the most efficient and effective measure, a climate change tax levied upon all US goods imported into Europe.

How large should such a tax be? If it is to be proportionate, it should cover the harm caused to the Earth from the production of the goods, a harm that will not be reflected in their price if the US presses ahead with the unfettered use of fossil fuels. Let’s consider some ballpark numbers. The Gross Domestic Product of the US in 2015 was about $18 trillion. The US emissions of greenhouse gases in the same year were about 7 billion tonnes of CO2 equivalent. Dividing one quantity by the other, we find that every thousand dollars of US production involves the emission of about 0.4 tonnes of CO2 equivalent.

The best estimate we have of the global harm caused by these emissions comes from integrated assessment models, like my PAGE09 model which gives a mean value of about $150 per tonne of CO2 if valued by an average citizen in Europe, or $250 per tonne of CO2 if valued by an average US citizen (US citizens are on average about 50% richer than European ones, so they should value an equivalent physical harm more highly).

Applying these mean values as an ad valorem tax on imports of USA goods to Europe results in a tax of about 6%, if the European valuation of harm is used, or 10% with the US valuation. These are higher, but not dramatically so, than Sarkozy’s proposal of a 1 – 3% tax on US imports.

How much might such a climate tax on US imports raise? The EU presently imports about 400 billion Euros of US goods and services per year. So a 6% tax rate would raise about 25 billion Euros per year, and a 10% rate would raise about 40 billion Euros. If imports of US goods and services have a price elasticity of -1, these revenues would be about 6% or 10% lower respectively.

If adopted, this idea could be refined further by levying higher rates on US goods that released a great deal of greenhouse gases during their production, and lower rates on others.  And of course, in order not to be hypocrites, we in Europe would introduce a strong, comprehensive climate change of about $150 per tonne of CO2 equivalent on our own activities too. But that is only common sense.

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5 Responses to A proportionate response to Trump’s climate plans

  1. Sarkozy’s proposal is not allowed.

    WTO rules only permit border taxes if there is an equivalent domestic tax. France’ carbon tax proposal did not make it.

    Border taxes are the exclusive competence of the EU. The EU would not permit France to have a border tax even if the WTO would.

    The WTO would not permit the EU a border tax unless there is an EU-wide carbon tax, which is very unlikely.

    Besides, border taxes are unlikely to change the behaviour of the party being sanctioned — here because the USA exports very little energy-intensive products to the EU.

    Border taxes do, of course, reduce trade. The border tax revenue typically does not outweigh the welfare loss due to lost trade.

      • Don’t take Tol seriously. (Well duh.) Note his premise that Trump can trample all over treaty commitments but everyone else needs to politely comply. Why, it’s almost as if Tol approves of bullying! Not at all the case, I’m sure.

        Anyway, for right now Trump has done nothing, and Sarkozy has simply laid down an appropriate poltical marker. Good for him.

    • What Trump wants is not allowed as well, so bollox to that! We live in times where there are more important things than WTO rules. Rules we’re made in a world without Trump.

  2. Eli Rabett’s Simple Plan to Save the World had this covered in 2007 and has since been adopted by Paul Krugman and others:

    Nations wishing to make major progress on decreasing greenhouse gas emissions should introduce emission taxes on all products. These taxes should be levied on imports as well as domestic goods at the point of sale, and should displace other taxes, such as VAT, sales taxes, and payroll (e.g. social security, health care) in such a way that tax revenues are constant, and distributed equitably.

    These should be introduced as an Emissions Added Levy (avoiding the bad jokes). EAL would be imposed on sale for emissions added in the preceding step and inherent to the consumption of the product, as would be the case for heating oil and gasoline. Manufacturers would pay the EAL on electricity they bought, and incorporate this and the levy on emissions they created into the price of the product they sell.

    Imports from countries that do not have an EAL would have the full EAL imposed at the time of import. The base rate would be generic EALs based on worst previous practices in the countries that do have EALs, which would be reduced on presenting proof that the actual emissions were lower.

    All countries with EAL systems would reserve a portion (say 5%) for assisting developing countries with adaptations (why not use acclimations?) and mitigating programs.

    By basing the levy on emissions rather than carbon all greenhouse gases stand on a common level, sequestration is strongly encouraged as well as such simple things as capturing methane from oil wells and garbage dumps (that gets built into the cost of disposal). The multipliers would come from CO2 equivalents on a 10 year basis.

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