11.   New York City owns the largest fleet of diesel buses in the country.

12.   Parker says that even the newest diesel buses are not as clean as natural gas.

13.   Phoenix officials say new, cleaner-burning diesel buses are about as effective.

14.   Scooters, motor rickshaws and diesel buses are responsible for most of the air pollution that gives so many Delhi residents persistent hacking coughs, they said.

15.   Southwest Gas Corp. computed the annual pollution emissions of a clean-burning diesel bus and a natural-gas bus, each equipped with a catalytic converter.

16.   The diesel buses that make the switchback journey up the mountain can fall victim to mudslides and Aquas Calientes is in dismal shape for such an important gateway.

17.   The diesel buses that the Transit Authority now uses waste a lot of energy during acceleration and braking.

18.   They are to replace diesel buses, which are notorious for spewing highly polluting exhaust into the air.

19.   Transportation officials say the electric buses are the first step in eliminating diesel buses.

20.   Will new regs on diesel buses and trucks get ditched by Bush and his petroleum pals?