Iowa State University has been awarded $450,000 by the US Agency for International Development to improve beans in Rwanda. The University’s Center for Sustainable Rural Livelihoods will work with local partners to see whether improving yields will result in beans that are more nutritious or more marketable or — Jackpot! — both. Nice idea, and if it succeeds a valuable contribution to fighting hunger and poverty in the region. As ever with this sort of project, however, one wonders whether specific steps will be taken to preserve the existing bean biodiversity that improved varieties will almost certainly displace.