Real Results: On-road Vehicles

Title of Chart: Impact of Control Programs on On-road Vehicle Carbon Monoxide Emissions
Carbon monoxide emissions from on-road vehicles were 113,766,887 tons in 1970. In 2000 carbon monoxide emissions from on-road vehicles were 50,104,061 tons. Without regulations and technological advances, they would have been 283,830,679 tons. Carbon monoxide emissions from on-road sources are estimated to be 26,547,949 in 2020, compared with 412,432,653 tons estimated without controls.

Title of Chart: Impact of Control Programs on On-road Vehicle Hydrocarbon Emissions
Hydrocarbon emissions from on-road vehicles were 15,033,766 tons in 1970. In 2000 hydrocarbon emissions from on-road vehicles were 4,651,749 tons. Without regulations and technological advances, they would have been 46,084,346 tons. Hydrocarbon emissions from on-road sources are estimated to be 1,541,545 in 2020, compared with 67,050,820 tons estimated without controls.

Title of Chart: Impact of Control Programs on On-road Vehicle Nitrogen Oxide Emissions
Nitrogen oxide emissions from on-road vehicles were 6,720,056 tons in 1970. In 2000 nitrogen oxide emissions from on-road vehicles were 10,658,093 tons. Without regulations and technological advances, they would have been 22,409,568 tons. Hydrocarbon emissions from on-road sources are estimated to be 4,213,424 in 2020, compared with 34,619,432 tons estimated without controls.

Title of Chart: Impact of Control Programs on On-road Vehicle Fine Particulate Matter Emissions
Fine Particulate Matter emissions from on-road vehicles were 249,080 tons in 1970. In 2000 fine particulate emissions from on-road vehicles were 139,616 tons. Without regulations and technological advances, they would have been 775,140 tons. Hydrocarbon emissions from on-road sources are estimated to be 116,453 in 2020, compared with 1,243,498 tons estimated without controls.