1.   Diesel tailpipe pollution contains a mix of arsenic, benzene, dioxins and PAHs, or polycyclic aromatic hydrocarbons, among other things.

2.   For the last two years, Ford Motor has voluntarily built its sport utilities to emit far less tailpipe pollution than allowed by law.

3.   Parsons was awarded the contract to design and construct a test to more accurately measure tailpipe pollution to bring New Jersey in line with federal clean air rules.

4.   The new test was designed to more accurately measure tailpipe pollution to bring New Jersey in line with federal clean air rules.

5.   The new test, designed to more accurately measure tailpipe pollution, was plagued by problems and breakdowns since it was instituted last winter.