The Oregon Department of Environmental Quality submitted formal comments to the Environmental Protection Agency on Friday over its decision to revoke a 2009 endangerment finding. In July, the EPA announced it was revoking the endangerment finding, which has been used to set stricter greenhouse gas emissions standards under the Clean Air Act. The scientific finding focused on six greenhouse gas emissions found in the atmosphere, including carbon dioxide and methane — powerful carbon emissions, that threaten public health and welfare. According to DEQ senior transportation policy advisor Gerik Kransky, the transportation sector accounts for 35% of the state’s overall greenhouse gas emissions. “The extra challenge here is that since that original Endangerment Finding, the science hasn’t weakened.