| lethal risk to birds from insecticide use in the united states--a spatial and temporal analysis. | we used pesticide use data and previously published models to estimate the lethal risk to birds from insecticides used in u.s. agriculture. data from the u.s. department of agriculture's national agricultural statistical service (nass, washington, d.c.) were used to assess how the lethal risk to birds has changed over the period 1991 to 2003 and to compare risk among crop types according to the most recently available surveys. because the nass data coverage is incomplete, both with respect to cr ... | 2006 | 16704051 |