According to a July 2010 analysis by the Department of Interior preceding Salazar's decision obtained through a Freedom of Information Act request:
"Although the proposed project would achieve all project objectives, and generate the maximum amount of beneficial socioeconomic, greenhouse gas, and air pollutant impacts, it would also result in the greatest number and magnitude of adverse impacts. These would include impacts to Biological Resources, Soil and Water Resources, and Visual Resources that could not be completely mitigated."Arguably the Ivanpah Solar project does not achieve maximum greenhouse gas reductions. Four the past year, hundreds of workers drive hundreds of miles each day to reach the remote site, and the concrete and steel requirements to build the power tower undoubtedly cause more emissions that installing an equal amount of photovoltaic solar panels on brownfields or on rooftops in the city.