The Era of Catastrophe? Geologists Name New Era After Human Influence on the Planet

Editor's note: This TomDispatch article has been edited for length. You can read the original here.

1. Farewell to the Holocene

Our world, our old world that we have inhabited for the last 12,000 years, has ended, even if no newspaper in North America or Europe has yet printed its scientific obituary.

This February, while cranes were hoisting cladding to the 141st floor of the Burj Dubai tower (which will soon be twice the height of the Empire State Building), the Stratigraphy Commission of the Geological Society of London was adding the newest and highest story to the geological column. Although the idea of the "Anthropocene" -- an Earth epoch defined by the emergence of urban-industrial society as a geological force -- has been long debated, stratigraphers have refused to acknowledge compelling evidence for its advent.

At least for the London Society, that position has now been revised. This new age, they explain, is defined both by the heating trend ... and by the radical instability expected of future environments. In somber prose, they warn that "the combination of extinctions, global species migrations and the widespread replacement of natural vegetation with agricultural monocultures is producing a distinctive contemporary biostratigraphic signal. These effects are permanent, as future evolution will take place from surviving (and frequently anthropogenically relocated) stocks." Evolution itself, in other words, has been forced into a new trajectory.

2. Spontaneous Decarbonization?

The Commission's coronation of the Anthropocene coincides with growing scientific controversy over the 4th Assessment Report issued last year by the Intergovernmental Panel on Climate Change (IPCC). The IPCC is mandated to establish scientific baselines for international efforts to mitigate global warming, but some of the most prominent researchers in the field are now challenging its reference scenarios as overly optimistic, even pie-in-the-sky thinking.

The current scenarios were adopted by the IPCC in 2000 to model future global emissions based on different "storylines" about population growth as well as technological and economic development. Some of the Panel's major scenarios are well known to policymakers and greenhouse activists, but few outside the research community have actually read or understood the fine print, particularly the IPCC's confidence that greater energy efficiency will be an "automatic" byproduct of future economic development. Indeed all the scenarios, even the "business as usual" variants, assume that at least 60 percent of future carbon reduction will occur independently of greenhouse mitigation measures.

The Panel, in effect, has bet the ranch, or rather the planet, on unplanned, market-driven progress toward a post-carbon world economy, a transition that implicitly requires wealth generated from higher energy prices ultimately finding its way to new technologies and renewable energy. (The International Energy Agency recently estimated that it would cost $45 trillion to halve greenhouse gas emissions by 2050.) Kyoto-type accords and carbon markets are designed -- almost as an analogue to Keynesian "pump-priming" -- to bridge the shortfall between spontaneous decarbonization and the emissions targets required by each scenario. Serendipitously, this reduces the costs of mitigating global warming to levels that align with what seems, at least theoretically, to be politically possible, as expounded in the British Stern Review on the Economics of Climate Change of 2006 and other such reports.

Critics argue, however, that this represents a heroic leap of faith that radically understates the economic costs, technological hurdles, and social changes required to tame the growth of greenhouse gases. European carbon emissions, for example, are still rising (dramatically in some sectors) despite the European Union's much praised adoption of a cap-and-trade system in 2005. Likewise there has been little evidence in recent years of the automatic progress in energy efficiency that is the sine qua non of the IPCC scenarios. Although The Economist characteristically begs to differ, most energy researchers believe that, since 2000, energy intensity has actually risen; that is, global carbon dioxide emissions have kept pace with, or even grown marginally faster than, energy use.