Hi, i've made some corrections to your essay, i'm not a professional english speaker since i'm also studying english like you, but i could find some errors, let me know if i made something wrong, greetings

ielts writting-task 2 air pollution (correct me, please)

Some people think international car-free days are an effective way of reducing air pollution, others think there are some other ways.
Discuss both views and give your own opinion.

My essay:
There is no doubt that the problem of air pollution is becoming increasingly severe. People may believe an international car-free days (car-free day) can improve air quality efficiently, but I will argue that other policies including public transportation needs to be implemented.
On one hand, prohibiting the drivers to use their vehicles may reduce the air pollution directly since cars and motorcycles do produce massive amounts of contaminant. However, this is (not) the most efficient way because there are a lot more factors (that) contribute to the bad air quality, including toxic gas produced by petrochemical industry and chimneys of factories. With the industrialization of the modern society, the thorny problem becomes harder to tackle.
On the other hand, other strategies are to be implemented by the authority. One possible solution is to improve the public transportation. With more subway(s) or bus station(s), commuters are encouraged to use these facilities and thus decrease the use of their own cars. Also, government should rise the standard of gas emission which force factories spend more money on filtering the air. Last but not least, more efforts should be made on the scientific research of air cleaning or reduction of pollution. This may not only create new technology that can control the damage, but also save our environment effectively.
In my opinion, the fundamental cause of air pollution is the lack of environmental awareness. One option has to be to teach everyone the importance of protecting our mother nature and raise public consciousness.
In conclusion, there are several solution(s) to the problem of the air pollution. While it may not be possible to find a complete solution, any action should probably involve encouraging greater use of public transportation and education about environmental protection.

i'm learning english and my native language is spanish, we both can speak if you want to, just let me know

My trip

hello

My name is Carolina, I'm from Colombia.
I tell you about my experience in other country; I traveled to Ecuador, the cities that i visited were Montañita, Mompiche, Esmeraldas and Quito, the best it was Montañita because is a place with a beach and its principal sport is surf,in Montañita have party always, the people are very funny. In quito i met two people, they are inteligent,
i think that i amused too much.