The American Lung Association supports stringent, technology - forcing measures to reduce emissions from mobile sources through the use of: (1) advanced low - or zero - emission vehicle technology; (2) low - polluting alternative fuels; and (3) pollution control equipment and efficiency measures to further reduce emissions from existing vehicles. (lung.org)
As shown in the following table, fossil fuel CO2 accounts for 95 percent of mobile source GHG emissions: (transportation.gov)
The American Lung Association supports emissions requirements for aircraft that are comparable in stringency to other mobile source emissions standards and supports measures, including regulation, to reduce aviation emissions. (lung.org)