rozprawka - proszę o sprawdzenie

Witam i proszę o sprawdzenie.

Nowadays, many people use modern devices, which were constructed by scientists. Researchers try to make a most technical advanced investions. Everybody watns to be up-to-date with new technology. There is not only pluses but also minuses in this situation.
The major advantage of using modern devices is that our life becomes easier. We can travel by car or call by cell phone. It is convenient and save a lot of our time. Moreover, the latest inventions helps us cure the most dangerous and uncurable diseasies. Scientist's researches provide a better medical care and prolong a human's life. Finally, everybody wants to possess the most modern devices. It causes a develop of a trade and other part of industry. People spend their money on many gadgets so many workers can work and gain money.
In the other hand, advanced researches are necessary in constructing new tools. Unfortunately, it is very expensive and requires detailed knowledge. Secondly, develop of a motorization is extremely harmful for environment. Cars, motorbikes or areoplanes produce a huge amount of greenhouses gases and exhaust fumes. Gases ruins ozone layer. fauna and flora worldwide. Last but not least, using of modern devices may be dangerous for our life and health. Many of gadgets are incompletely tested so can make a bad influence on our life.
In conclusion, it is very dificult to life without technology nowadays. Usage of modern devices has more pluses than minuses but it requires responsibility.

Researchers try to make 'a' (dlaczego tu jest 'a' jak ma byc 'the'?) most technical advanced 'investions' (ortog).
There 'is' (ale przeciez twoj rzeczownik 'pluses' jest w l. mnogiej, dlaczego czasownik nie jest odpowiedni do l. mn?) not only pluses but also minuses in this situation.
It is convenient and 'save' ('it' to 3os.l.poj, a w takiej situacji to czasownik dostosowujemy do 3os.l.poj - popraw) a lot of our time. Moreover, the latest inventions 'helps' (inventions to l. mnpoga, wtedy czasownik ma byc w l. mn- HELP, nie 'helps' ktory odpowiada 3os.l.poj) us cure the most dangerous and uncurable 'diseasies' (ortog). 'Scientist's' (o ktorym specificznym scientist tutaj piszesz, jak 'scientist' w l. mn to prosze napisac to tak jak ma byc) researches provide a better medical care and prolong a human's life.
It causes 'a develop' (tutaj inaczej...THE DEVELOPMENT of 'a' (a o ktorej specificznej 'trade' tutaj piszesz, jak myslisz w l. mnogiej, to bez 'a') trade and other partS of industry.
'In the other hand' (W drugiej rece? jak to? tutaj ma byc ON THE....), advanced researches are necessary in constructing new tools.
Secondly, THE 'develop' (tutaj ma byc rzxeczownik DEVELOPMENT of 'a' (niepotr) motorization is extremely harmful for THE environment. Cars, motorbikes or areoplanes produce a huge amount of 'greenhouses' GREENHOUSE gases and exhaust fumes. Gases 'ruins' (gases to l. mnoga, prosze dostosowac czasownik do l. mnogiej!) ozone layer AND fauna and flora worldwide. Last but not least, using 'of' (niepotr) modern devices may be dangerous for our life and health. Many of THE gadgets are 'incompletely' (zle slowo tutaj ma byc NOT FULLY tested so can 'make a bad influence' (napisz to inaczej...) on our life.
In conclusion, it is very dificult to 'life' ('life' to jest rzeczownik, a tutaj potrzebujesz czasownika, zacznij rozpoznawac roznice) without technology
nowadays. THE usage of modern devices has more pluses than minuses but it
requires responsibility.