Reword this into one sentence using both joining words (since, but) Electrical cars are better for the environment.
They produce less pollution than regular cars.
They can be expensive.

Afirefighter is a rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property and the environment as well as to rescue people and animals from dangerous situations.  just cut some parts to make them shorter and add some of your facts or what describes them most. or what they are supposed to do.