Tag Archives: Tilman

Compounded Climate Accounting Errors

Timothy Searchinger, visiting scholar at Princeton University, Dan Kammen of the University of California Berkeley, David Tilman of the University of Minnesota and other authors from the Environmental Defense Fund published an interesting new proposal in the Policy Forum section of Science magazine today. The argument put forward is that “Replacing fossil fuels with bioenergy does not by itself reduce carbon emissions, because the CO2 released by tailpipes and smokestacks is roughly the same per Read More >

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Environmentalists Want to “Stick” It to Farmers

Jason Hill of the University of Minnesota’s Institute on the Environment wrote recently in the St. Paul Pioneer Press, asking why the Waxman-Markey climate change bill should treat agricultural emissions differently from energy and transportation emissions, with a “carrot-and-stick approach, one in which fossil fuels suffer the stick while agriculture feasts upon the carrot.” Hill’s primary objection to the bill is the amendments added by Rep. Collin Peterson (D-Minn.), which exempt agriculture and forestry from Read More >

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New Biofuels Manifesto

University of Minnesota Professor David Tilman, Princeton University Visiting Scholar Tim Searchinger, Dartmouth Professor Lee Lynd and others involved in the debate over the environmental and social impacts of biofuels have published in Science magazine what amounts to a new manifesto on how biofuels can be done right. The authors list five biofuel feedstocks that are the best in terms of sustainability — “lower life-cycle greenhouse-gas emissions than traditional fossil fuels and with little or Read More >

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Life Cycle Analysis, International Land Use Change and Uncertainty

Bruce Dale, University Distinguished Professor of Chemical Engineering at Michigan State University, shared this presentation that he gave during a webinar hosted by the North Central Bioeconomy Consortium. In it, he highlights the number of factors in Life Cycle Analysis and Indirect Land Use Change (ILUC) models that produce uncertainty – in other words, if the assumptions or data for these factors change, how much do the results change. Dale is primarily examining the “carbon Read More >

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Tilman clarifies study

Much of the media coverage of the recent Science Magazine studies made it clear that many hadn’t actually read the studies before they reported on them. Some interpreted the studies as condemning corn ethanol production now, not as the worst case scenario of what could happen in the future. University of Minnesota professor David Tilman, an author of one study, clarified it today in an interview with Minnesota Daily: Tilman, who is currently on sabbatical Read More >

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