Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: EPA targets fine particle pollutants Fine particle pollution has been significantly reduced in recent years, but millions of people live in areas where concentrations remain high - and their health remains at risk, the 

Sci/Tech