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Facebook monthly users rose by nearly 10% last year to just over 2.3 billion people, while the company's revenues from advertising rose 30%. We digest the company's annual results with Bloomberg technology reporter Sarah Frier in San Francisco. The US Federal Reserve announces it won't be changing interest rates any time soon. Our economics correspondent Andrew Walker explains the implications of this. And as 90 million Americans are hit by Antarctic temperatures, just how cold does it get in a 'polar vortex freeze'?
Nigel Cassidy is joined throughout the programme by environmentalist and lawyer Maya Van Rossum, director of the Delaware Riverkeeper Network in New York, and Dr. David Kuo, CEO of The Motley Fool in Singapore.

(Picture: The Facebook logo on a phone. Credit: Maciej Luczniewski/NurPhoto via Getty Images)