This is the home page of Tim Searchinger, a Research Scholar at Princeton's Woodrow Wilson School.
Below is information about some recent papers.
A technology forcing approach to reducing nitrogen pollution, Nature Sustainability (2018). Nitrogen losses from agriculture are already major sources of water and air pollution and greenhouse gas emissions and will grow as food production increases by 50% or more by 2050 even if farmers improve their management. This article suggests a technology-forcing, flexible regulatory strategy to encourage fertilizer manufactureers to increase the share and effectiveness of compounds that help limit nitrogen runoff. Such compounds, known as "enhanced efficiency fertilizers" have been shown on average to increase efficiency, reduce runoff and emissions, and increase yields but they have variable results and are not extensively used. This article suggests incorporating an approached based on so-called "CAFE" standards, which have required automobile manuifacturers to increase the miles per gallon of the cars they sell over time. Requiring fertilizer manufacturers to sell more and better fertilizers over time could encourage the innovations necessary to truly alleviate nitrogen pollution. Even without fertilizer innovations, the artgicle esetimates that applying this approach to the U.S. corn sector would save millions of dollars for farmers, generate billions in overall economic savings, and cause large reductions in nitrogen losses. We suggest that governments such as those in China or California could enact these kinds of regulatory programs as part of their efforts to reduce greenhouse gas emissions and other forms of pollution.
"Europe’s renewable energy directive poised to harm global forests." Nature Communications (2018). The European Commission has agreed this year to a renewable energy directive (RED), which will require that all countries in the European Union increase the percentage of energy that comes from renewable energy by 2030. Although this general regulation is admirable, it treats nearly all bioenergy as fully qualifying, low-carbon, renewable bioenergy including the harvest of wood from forests deliberately to burn. In January, roughly 800 scientists wrote to the European Parliament warning them that doing so would likely lead to forms of bioenergy that actually increased carbon in the atmosphere for decades compared even to using fossil fuels. This letter along with a video about the issue and other materials can be found at www.empowerplants.com. The letter encouraged the Parliament to limit this qualifying renewable energy from forest biomass to residues and wastes, but the Parliament rejected such an amendment. Eventually, negotiations with the European Commission and Council of States led to an agreed RED that also allows cutting down and burning of whole trees. This article provides an academic treatment of this issue and finds that the RED could plausibly lead Europe to burn an additional amount of wood equal to all its present wood harvest and increase greenhouse gas emissions from energy use by 10% compared to the alternative. It discuisses why the so-called sustainability criteria do not prevent this result.