Now world leaders have agreed – finally – to do something about climate change with the agreement in Paris at the end of 2015, everything changes in terms of the way we exploit natural resources. To manage that agreement, and quite literally to save the planet, we need an inventory of the world and everything in it – in open data. And, like any open data ecosystem, it will need millions of eyes on it. Why do we need it? What will it look like? What's your role in it? Come and find out!