With its combination of compel efficiency and efficacy, diesel technology is used by most U.S. commercial trucks, too as most farm and interpretation Accoutrement, freight locomotives, and many marine vessels. As a consequence, diesel represented 22 percent of the U.S. petroleum-based carbon dioxide emissions as of 2005.
Improved Technology
Older diesel engines used a mechanical pre-combustion operation to homogenize fuel and air, substantial to incomplete fuel combustion and amassed harmful tailpipe emissions. On the contrary, newer diesel engines end a regulate fuel injection process to larger discipline the combustion action and emissions. Diesel engines are generally deeper fuel efficient than petrol engines.
Composition
Newer diesel engines produce low levels of carbon dioxide, carbon monoxide, and hydrocarbons. Moreover, diesel engines emit reactive nitrogen compounds and particulate matter.
Health Effects
According to the the U.S. Environmental Protection Agency, exposure to diesel exhaust has been linked to lung cancer and an assortment of non-cancer respiratory problems. The EPA's standards for new trucks and vehicles in 2007 was 0.2 grams of nitrogen oxides per brake horsepower hour, compared to 10.7 grams in 1984.
The risk of lung cancer was highest among workers in occupations where diesel engines are used.