While primary standards are designed to protect human health, secondary standards are established to protect the environment. In the case of NOx and SOx, some of the primary targets include reduced aquatic and terrestrial acidification, and reduced nitrogen deposition on land and water.
"The world has seen seven global cholera outbreaks since 1817, and the current one seems to have come to stay. Rising temperatures and a stubbornly persistent, toxic bacteria strain appear to have given the disease the upper hand."
"Environmental factors play a more important role in causing autism than previously assumed and, surprisingly, an even larger role than genetics, according to a new study out of UCSF and Stanford that could force a dramatic swing in the focus of research into the developmental disorder."
"The owner of the West Virginia coal mine where an explosion killed 29 men last year kept two sets of books on safety conditions -- an accurate one for itself and a sanitized one for the government, federal regulators said Wednesday."
"Exposure to wildfire smoke -- particularly that from smoldering peat -- can dramatically increase the risk of cardiac and respiratory illness, according to new research led by the Environmental Protection Agency."
"The Canadian delegation at an international summit admitted Thursday it agrees with the work of a United Nations scientific panel that wants limits placed on the export of chrysotile asbestos, but Canada still won't back the move."
"Canada told the world Wednesday it opposes placing limits on the export of chrysotile asbestos -- a 'bombshell' expected to derail international efforts to list the mineral as hazardous."
"Researchers found 'significantly higher' rates of birth defects in areas with mountaintop removal mines than in non-mining regions in central Appalachia, according to a study released Tuesday."