Alibaba Prepares for Mega Stock Market Listing

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Alibaba, the Chinese internet giant, weighs up its own value, ahead of what's expected to be the biggest stock market offering in history - with an expected valuation of around $200 billion. We ask if it's worth it. Also, Google is being called a 'platform for piracy' by Rupert Murdoch. We ask why the media baron is asking the European Commission to adopt a more robust approach when it comes to the internet search engine. We take a look at carbon taxes for businesses, after a UN report says that harmful greenhouse gases globally are at record levels. Finally, we look at a new app in the US which can read the barcode of whatever you are buying, and tell you if the money ends up funding a political party or a cause you don't support.