your introduction seems a bit long and does not stick to the prompt "
Can it be simply avoided if the country takes an environmentally friendly approach?". I did not find your view about this in your intro
First of all, the competition among the car manufacturers, make them severely strive to enhance the features of the car to make it more comfortable.
your topic sentence is not clear because it does not link to topic you are going to say about : country's development cause pollution and environmet damage. Not relevant !
The same mistake. The topic sentence must be clear
looking forward to using
kill two birds with one stone -> idiom sounds unnatural and awkward
both your two latter sentences have grammatical errors -> lack subjects -> what minimize the country budget ? what generate electricity ?
if you mean these are two purposes of using solar energy you should not split up your sentence