Tools and initiatives are underway to encourage scientists to publicly archive their data. This analysis confirms there is a lot room for improvement still. By querying the full text of the scientific literature through websites like Google PubMed and Scholar Central, Piwowar determined eleven thousand studies that collected a particular kind of data about cellular activity, known as gene expression microarray data. Just 45 percent of latest gene expression research were found to have deposited their data in the public databases developed for this purpose. The rate of data publication has increased only somewhat from 2007 to 2009. Data is certainly shared least often from studies on tumor and human subjects: tumor studies make their data available for wide reuse half as often as similar studies outdoors cancer.Related StoriesNew study heightens concerns over detrimental impact of polluting of the environment on gene connected with Advertisement riskUniversity of Surrey-led research reveals factors behind Delhi's pollution problemsWalking to sort out quieter side streets may reduce risk of contact with peaks in harmful atmosphere pollutionShe said the analysis also raises issues about important educational issues. Since Mexico City kids attend underprovided public institutions mostly, children do not build cognitive reserves that serve as a protection to pollution impacts. A IQ difference of 10 factors will probably have a negative impact on academic and cultural problems, including bullying and teen delinquency, she said. The authors argue that sustained exposures to urban air pollution result in cognitive underperformance and metabolic brain changes that may lead to an acceleration of neurodegenerative changes.