species extinction

Calculating the Extinction Cost of Carbon

Or, how many megatons do we need to cut to prevent one extinction?

Economists often talk about the social cost of carbon, which basically translates the harm done by a ton of CO2 into dollars. The dollar metric is less useful as applied to ecological impacts like species extinctions than impacts of humans. It may be better to skip the dollar conversion, and just ask how much a …

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What Threatens Biodiversity?

Are we too worried about climate change to focus on the other problems we know about?

Yesterday, Nature published a noteworthy comment on the biodiversity crisis, written by researchers at the University of Queensland and the International Union for Conservation of Nature (IUCN). The piece is based on a study of 8,688 species that are classified on the IUCN’s Red List either as threatened (vulnerable, endangered, or critically endangered) or near-threatened. The main …

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Millenium Development Goals Report 2011

We’re a little late on this, but early last month the United Nations issued its 2011 Millenium Development Goals report, which really should be at the top of the environmental community’s focus. Usually, the MDGs are thought of simply as concerning poverty and development, but of course these issues deeply concern the environment. More directly, although not …

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A Word on Congestion Pricing

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