Chemical pollution Pancevo- Belgrade?

It happened three days ago: Pancevo, ONLY 10 kilometers (6 miles) east of the Belgrade, prompting thousands of residents to remain indoors as levels of benzene and chlorine in the air soared to 10 times higher than normal.The factories were heavily bombarded during the 1999 NATO air attacks on Serbia over the Kosovo conflict, causing leakage and contamination of both the air and land. Demonstrations were held in Pancevo and Belgrade as well and those who live in downtown of Belgrade, I am recommending you not to go out (though there is no official alert in Belgrade, as I just came from outside, and the toxins in the air make your breath shortnened and strange feeling the lungs.