Christiana was the Executive Secretary of the UN Framework Convention on Climate Change, and as such, had overall responsibility for the UN reaching what would become the Paris Agreement.
Christiana je bila izvršna tajnica UN-ove Okvirne konvencije  o klimatskim promjenama, te je, kao takva, imala potpunu odgovornost da UN postigne ono što će kasnije postati Pariški sporazum.