Seeker Blog

McKinsey continues to publish more materials from their energy policy scenario planning. This one is subtitled “Curbing climate change and sustaining economic growth” — the emphasis is mine. Excerpt:

Any successful program of action on climate change must support two objectives—stabilizing atmospheric greenhouse gases (GHGs) and maintaining economic growth. Research by the McKinsey Global Institute and McKinsey’s Climate Change Initiative finds that reconciling these two objectives means that “carbon productivity,” the amount of GDP produced per unit of carbon equivalents (CO2e) emitted, must increase dramatically.

To meet commonly discussed abatement paths, carbon productivity must increase from approximately $740 GDP per ton of CO2e today to $7,300 GDP per ton of CO2e by 2050—a tenfold increase. This is comparable in magnitude to the labor productivity increases of the Industrial Revolution. However, the “carbon revolution” must be achieved in one-third of the time that economic transformation took in the Industrial Revolution if we are to maintain current growth levels while keeping CO2e levels below 500 parts per million by volume (ppmv), a level that many experts believe is the maximum that can be allowed without significant risks to the climate.

The macroeconomic costs of this carbon revolution are likely to be manageable, being in the order of 0.6–1.4 percent of global GDP by 2030. To put this figure in perspective, if one were to view this spending as a form of insurance against potential damage due to climate change, it might be relevant to compare it to global spending on insurance, which was 3.3 percent of GDP in 2005. Borrowing could potentially finance many of the costs, thereby effectively limiting the impact on near-term GDP growth. In fact, depending on how new low-carbon infrastructure is financed, the transition to a low-carbon economy may increase annual GDP growth in many countries.

If we do not increase our carbon productivity, the consequences will be stark, the report suggests. Meeting commonly discussed abatement target would require a per-person carbon budget of 6 kilograms of CO2e per day. If one had to live on such a carbon budget with today’s low levels of carbon productivity, one would be forced to choose between a 40 kilometer car ride, a day of air conditioning, buying two new T-shirts (without driving to the shop), or eating two meals. So without a major boost in carbon productivity, stabilizing greenhouse-gas emissions would require a major drop in lifestyle for developed countries and would hinder economic development in low income countries.

This is some of the best current work on policy options.