EPA announced that long-term exposure to diesel exhaust may cause lung cancer.

Biodiesel, on the other hand, can reduce targeted cancer-causing compounds by up to 90%.

Polycyclic aromatic hydrocarbons (PAH) and nitrated polycyclic aromatic hydrocarbons (nPAH) are EPA-targeted compounds found in diesel exhaust that may be linked to cancer. Pure biodiesel reduces most PAH compounds by 80% and nPAH compounds by 90%.

The findings are the result of two years of independent studies on biodiesel as the fuel completed health effects testing requirements of the Clean Air Act. To date, biodiesel is the only fuel to have completed the tests.