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: BHP Billiton approves \$1.6 bln copper, iron ore projects MELBOURNE - BHP Billiton Ltd./Plc. (BHP.AX: Quote, Profile, Research) (BLT.L: Quote, Profile, Research) , the world #39;s biggest miner, has approved a \$990 million copper project in northern Chile and a \$575 

Business