Hi Tatyana,

Good job.

This is pretty complicated text so it can be pretty challenging to write.

Just a few corrections:

Translation

We can buy pure water and good-quality food. (But) We can't buy clean air. Polluted air easily crosses borders, companies, towns and countries, and penetrates into the offices, homes and hospitals. Therefore, we can only welcome the work of the WHO Regional Office, that solves the problem of providing good air quality. One of the important activities in this area is monitoring of the air. Quite naturally, the main task of monitoring is the acquisition (or accumulation, or generation) of such information about air quality , which will allow to estimate its influence on peoples health, that in turn, provides more reliable information base for implementing and control of the effectiveness of appropriate management decisions.

Very good.

Here are a few minor edits:

Researcher

My research work is related to environmental catalysis. There is a research group in our University that studies foam materials and their application in exhaust and waste gas treatment.
Open-cell foams are well-known group of materials since early 60s. They are mostly made from reticulated polyurethane foams via replication method.
I entered my university in 2006 after finishing High school. I began to study at the IT department. Five years of study passed, and I graduated from the University this summer. Last academic year I begun to carry out some research work at our department. I’ve liked it and have decided to concentrate my future work on science. That’s why I’ve decided to enter graduate studies. The problems of environmental catalysis are topical nowadays; we must keep the Earth clean to stay alive. Working on such problems we can bring some good to another people. That’s why I prefer to work in this branch of science and to dedicate my thesis to the improvement of catalytic cleaning of waste and exhaust gases.
My advisor is PhD in technical sciences. He advises me on my graduate work.
At our department students work on computer-aided engineering software and learn how to create their own programs in C++. After graduating the University, employment is guaranteed. Our graduates can be employed as computer chemical engineers and software developers.

I.... But....

so. I'm 19 years old. But I'm married.
I study in Khabarovsk. But I live in the village.
I study tourism. But I don't travel.
I'd like to work. But there is nowhere.
I.... But.... =\