Latest Steven Davis Stories

2011-10-17 21:57:49

It is difficult to measure accurately each nation's contribution of carbon dioxide to the Earth's atmosphere. Carbon is extracted out of the ground as coal, gas, and oil, and these fuels are often exported to other countries where they are burned to generate the energy that is used to make products. In turn, these products may be traded to still other countries where they are consumed. A team led by Carnegie's Steven Davis, and including Ken Caldeira, tracked and quantified this supply chain...

2011-05-10 15:09:14

Accurately calculating the amount of carbon dioxide emitted in the process of producing and bringing products to our doorsteps is nearly impossible, but still a worthwhile effort, two Carnegie researchers claim in a commentary published online this week by Proceedings of the National Academy of Sciences. The Global Ecology department's Ken Caldeira and Steven Davis commend the work of industrial ecologist Glen Peters and colleagues, published in the same journal late last month, and use that...

2010-10-04 22:31:58

Geologists have found evidence that some 55 million years ago a river as big as the modern Colorado flowed through Arizona into Utah in the opposite direction from the present-day river. Writing in the October issue of the journal Geology, they have named this ancient northeastward-flowing river the California River, after its inferred source in the Mojave region of southern California. Lead author Steven Davis, a post-doctoral researcher in the Department of Global Ecology at the Carnegie...

2010-06-15 14:17:55

The Green Revolution of the late 20th century increased crop yields worldwide and helped feed an expanding global population. According to a new report published in the Proceedings of the National Academy of Sciences, it also has helped keep greenhouse gas emissions at bay. The researchers estimate that since 1961 higher yields per acre have avoided the release of nearly 600 billion tons of carbon dioxide to the atmosphere. "That's about 20 years of fossil fuel burning at present rates," says...

2010-03-08 15:19:07

A new study by scientists at the Carnegie Institution finds that over a third of carbon dioxide emissions associated with consumption of goods and services in many developed countries are actually emitted outside their borders. Some countries, such as Switzerland, "outsource" over half of their carbon dioxide emissions, primarily to developing countries. The study finds that, per person, about 2.5 tons of carbon dioxide are consumed in the U.S. but produced somewhere else. For Europeans, the...

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