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: Ohio EPA plan to revise clean-air rules criticized Some environmentalists believe Ohio is backsliding on requirements for modernizing coal-fired power plants, factories, and other major air pollution sources simply by making state rules consistent with what is mandated by a US Environmental Protection 

Sci/Tech