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: Australia, Japan work on near zero-emission coal-fired electricity plant (AFP) AFP - Australian and Japanese researchers are working on a prototype  quot;near zero-emission quot; coal-fired electricity plant in an effort to reduce a major source of greenhouse gas emissions, they said.

World