Nowadays 'amounts' (nie, to jest zle slowo, tutaj wystarczy 'the number') of people WHO ARE using a car to commute is constantly increasing. We have more money than formerly- it 'allow' (uwazaj ja takie chwyty - he'she'it - to 3os.l.poj - w regul. czasow. maja inna koncowke) us to use the most comfortable 'mean' (tutaj l. mnoga - means) of transport. 'This' (tutaj l. mnoga These) changes HAVE made our lives easier, but (tutaj cos brakuje THEY) also brought a lot of new problems.
Firstly driving a car 'is faster' (tutaj troche sens zdanie jest nie tak - chcesz powiedziec, ze autem szybciej dojezdzamy do celu - zmien zdanie) than taking a bus. We can avoid waiting for (przedimek) bus or (przedimek) train and we 'haven’t to' (napisz to w calosci ' have not to' - to nie wyglada styliczne dobrze, lepiej...do not have to) stop in bus stops and stations. Secondly driving 'by' (a) car is (przedimek) only way when you want to leave your home at night. 'Night public transport lines' (mozna inaczej...The public transport night provisions) are rare, and travelling in them is dangerous.
'By' ON the other hand- using public transport is not 'so' (AS) much harmful for (przedimek) 'environmental' (zla czesc mowy - tutaj rzeczownik) 'like' (cos z tym 'like' to ja zawsze cos mam - lepiej napisac...kiedy poroznamy to z) using a car. Carbon dioxide contained in fumes causes global warming, the effects of which 'would' (tutaj przypuszczasz ze moga byc - ale mozna napisac 'could be' - wieksza przypuszczalnosc) be painful for 'the' (niepotr) humanity.
'Especially' (dodaj to zdanie do porzedniego) in big cities- WHERE huge traffic jams can 'slowing' (zla czesc mowy - tutaj 'slow') us for 'a' (nie dajemy przedimka przed l. mn - hours) long hours. Finally- traveling by bus or metro is not 'so' (napisz AS) boring 'like' (znowu to 'like' - to jest niezreczne slowo - tutaj AS A) lonely journey. Being among other people 'allow' (tutaj 'it'3os.l.poj...it allowX us) us to meet colleagues and classmates(,) (niepotr tego przecinka) travelling to the same place.
After having weighed up all the pros and cons I think that the changes in people'S attitude are inevitable. One (ale co? musisz napisac)we can do is 'limiting' (to limit) pollution through building 'news' (zle slowo) eco-friendly (ale jakie? czy masz na mysli 'car' to napisz) engines. I hope scientists will invent 'the' (tutaj lepiej AN) energy-efficient vehicle in the future.