Ahead of this week's Rio+20 conference on Sustainable Development, Secretary-General Ban Ki-moon recorded a special message for social media fans and followers on the future he wants.
ESCAP chief Noeleen Heyzer is at Rio+20 and she wants to deliver the message that we must "rebalance the pillars of sustainable development - ensuring that people are placed more firmly at the centre of the post-2015 development agenda."