President Obama is just one of the high-profile world leaders who have come to Paris for talks on how to regulate and cut carbon dioxide emissions. But he is arguably the most influential.
ITV News and the Public Media Alliance have asked people from across the globe to pose their questions to President Obama in a series of videos as he takes part in the UN Climate Conference.
And here's what the world wants to ask him about climate change.
'Why is there money for war, but not our climate?' (Syria)
'We need change now, not later' (Thailand)
'Are we doing enough to protect Africa?' (South Africa)
'How long will life be safe for us?' (Phillipines)
ITV News and the Public Media Alliance - a global association of public service providers - made the global appeal for questions for President Obama in an attempt to find out how climate change is affecting communities across the world.