IBM said Monday it had signed an agreement to help curb pollution in China, starting with the dangerous smog that afflicts Beijing. The US computing giant said it would launch a 10-year program called Green Horizon that would support China in transforming its national energy systems and protecting the health of citizens. IBM said one of the first partners to come on board is the Beijing municipal government. By having access to real-time data about Beijings air quality, authorities will be able to take steps to either curb pollution or alert citizens more efficiently.