Our economic growth system is reaching limits in a strange way
Figure 2 shows world economic growth on a different basis–a basis that appears to me to be very close to total world GDP, as measured in US dollars, without adjustment for inflation. On this basis, world GDP (or Gross Planetary Product as the author calls it) does very poorly in 2015, nearly as bad as in 2009.

Figure 2. Gross Planet Product at current prices (trillions of dollars) by Peter A. G. van Bergeijk in Voxeu, based on IMF World Economic Outlook Database, October 2015.
The poor 2015 performance in Figure 2 reflects a combination of falling inflation rates, as a result of falling commodity prices, and a rising relativity of the US dollar to other currencies.
Clearly something is wrong, but virtually no one has figured out the problem.
The World Energy System Is Reaching Limits in a Strange Double Way
We are experiencing a world economy that seems to be reaching limits, but the symptoms are not what peak oil groups warned about. Instead of high prices and lack of supply, we are facing indirect problems brought on by our high consumption of energy products. In my view, we have a double pump problem.

Figure 3. Double gasoline pump from Torrence Collection of Auto Memorabilia.
We don’t just extract fossil fuels. Instead, whether we intend to or not, we get a lot of other things as well: rising debt, rising pollution, and a more complex economy.
The system acts as if whenever one pump dispenses the energy products we want, another pump disperses other products we don’t want. Let’s look at three of the big unwanted “co-products.”
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