For once, I agree with Tim Worstall: rich countries are more resilient, because they are more diversified, intraconnected and wealthy. Look at the different impact of a drought:
we appear to be having (despite the interruptions to Wimbledon) something of a drought in SE England this year. People using standpipes is hardly the same level of catastrophe as when the rains fail in poor rural peasant societies and a significant portion of the population die as a result.
All true, so I’m surprised that Tim goes on to dismiss the danger posed to the same poorer, less resilient societies by global warming:
This is the rationale behind one set of suggested actions to deal with climate change: do nothing. As the IPCC Third Report assumes, in 2100 the entire world will be at current US levels of wealth or more and our descendents will have a much more resilient society capable of dealing with the 30 cm sea level rise, and the couple of degrees temperature rise, predicted.
Now, let’s leave aside the fact that there are many scenarios posited in the IPCC report and the ‘entire world’ income figure Tim is reporting is more of an average, which is rather different. My point is that there is a very good reasons why the assumption Tim says is underlying the IPCC’s climate change model won’t be borne out for the poorest region of the world, Sub-Saharan Africa: because its per capita income growth has been static over the last 25 years rather than annual 4% required to get to current US levels of income by 2100, and even if the upward trend of the last few years is not a blip, climate change is expected to significantly reduce future growth.
It would be completely wrong to conclude that because Africa might not get to the posited rich-world income level by 2100, global warming won’t happen. It’s already happening, due mainly to the emissions of the richer world regions, and it’s already had a serious effect:
O’Reilly and colleagues reported in the 14 August 2003 issue of Nature that climate change had contributed to a 30% decline in Lake Tanganyika fish stocks over the past 80 years. Such declines can be disastrous for the villages in the region, where the average income is less than US$250 per year, and where the people depend on the fish from these lakes for all of their protein.
Meanwhile, there is likely to be a huge increase in land aridity as a result of climate change. The knock-on effects will probably not be pretty:
Decreasing pastoral lands, decreasing available tillable land, decreasing wild game, and decreasing available water all add up to more strife, Scholes says. “Subtropical dry, arid areas are going to be a huge source of conflict over the next half-century because we still have very, very high population growth rates in those areas, very low economic growth rates, and deteriorating environment,” he says.
It’s ironic that the world region which has contributed least to anthropogenic global warming will probably be the one to suffer most from it. If that debt doesn’t compel us to act, I don’t know what can. Global warming has started, but future warming can still be reduced, and the impacts mitigated with help. ‘Do nothing’ is not an option.