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The catchment area of the Mississippi River
Mississippi Watershed Map The catchment area of the Mississippi River covers almost 40% of the U.S. continental landmass, collecting freshwater from 32 states. Included in the runoff that feeds the river system are large quantities of agricultural fertilizer and other chemicals that eventually drain into the Gulf of Mexico, creating an ever-growing “dead zone.” Source: Environmental Protection Agency

Air pollution

In many parts of the world, pollution of the air by industrial particles is now less a problem than it was a century ago, when newspapers lamented the “black snow” over Chicago. This is due to concerted efforts by a clean air caucus of international scope that arose in the 1940s and gained significant political influence with the emergence of the environmental movement in the 1970s. The impact of the post-70s environmental movement on the quality of air and water, mostly in the West, but also developing countries such as India, is the most hopeful precedent we have that the sustainability issues facing the world in the new century might yet be overcome, given political will and organization equal to the task.

Climate change

Air pollution is still a major problem in the megacities of the developing world, however, while a global change in air chemistry—an increase of 40% in the carbon load of the atmosphere since industrialization—is ushering in an era of accelerated climate change. This era will be characterized by increased droughts and floods, higher sea levels, and extreme weather events, unevenly and unpredictably distributed across the globe, with the highest initial impact in regions that, in economic and infrastructural terms, can least support climate disruption (for example, sub-Saharan Africa). The environmental historian J. R. McNeil estimates that between 25 and 40 million people died from air pollution in the 20 th century. The death toll arising from climate change in the 21 st century is difficult to predict, but given the scale of the disruption to weather systems on which especially marginal states depend, it is likely to be on a much larger scale.

Summary

From the Portuguese sea merchants of the 16 th century in quest of silver and spices from Asia, to the multinational oil companies of today seeking to drill in ever more remote and fragile undersea regions, the dominant view driving global economic growth over the last half millennium has been instrumentalist    , that is, of the world’s ecosystems as alternately a source of raw materials (foods, energy, minerals) and a dump for the wastes produced by the industrialization and consumption of those materials. The instrumentalist economic belief system of the modern era, and particularly the Industrial Age, is based on models of perennial growth, and measures the value of ecosystems according to their production of resources maximized for efficiency and hence profit. In this prevailing system, the cost of resource extraction to the ecosystem itself is traditionally not factored into the product and shareholder values of the industry. These costs are, in economic terms, externalized .

A future economics of sustainability, by contrast, would prioritize the management of ecosystems for resilience rather than pure capital efficiency, and would incorporate the cost of ecosystem management into the pricing of goods. In the view of many sustainability theorists, dismantling the system of “unnatural” subsidization of consumer goods that has developed over the last century in particular is the key to a sustainable future. Only a reformed economic system of natural pricing, whereby environmental costs are reflected in the price of products in the global supermarket, will alter consumer behavior at the scale necessary to ensure economic and environmental objectives are in stable alignment, rather than in constant conflict. As always in the sustainability paradigm, there are tradeoffs. A future economy built on the principle of resilience would be very different from that prevalent in the economic world system of the last 500 years in that its managers would accept reduced productivity and efficiency in exchange for the long-term vitality of the resource systems on which it depends.

Review questions

What are the major technological and economic developments since 1500 that have placed an increased strain on the planet’s ecosystem services? What is the role of carbon-based energy systems in that history?

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What is the so-called Great Acceleration of the 20 th century? What were its principal social features and environmental impacts?

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What is the Green Revolution? What were its successes, and what problems has it created?

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Practice Key Terms 4

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Source:  OpenStax, Sustainability: a comprehensive foundation. OpenStax CNX. Nov 11, 2013 Download for free at http://legacy.cnx.org/content/col11325/1.43
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