Where to begin? I think the two main problems are that they are too expensive and are still not very fuel efficient. Other problems include high use of resources, limited recyclability, pollution, over utilization of single occupant vehicles, etc.
Various Cars, but the two main ones are BMW's and Bentley's.
what are two main practices that aid in problem solving in chemistry problems
Yes you can.
The function of the step bars used on cars is to prevent the main bodywork of two cars or their wheels being damaged if two cars collide. It acts as a barrier.
Airbags and seat belts
The Iranian nuclear program; and assimilation.
Poverty and obesity
There are two main problems that are likely to occur when you overclock your computer's hardware system. These problems include overheating and system failure.
1.From cars 2.From car sounds
TCS, ABS, and STC
to save gas, & better looking cars
modern art