At the UN climate conference in Cancun we talked to water expert Fernando Miralles-Wilhelm of the Inter-American Development Bank. The expectations may be low for the present round of climate talks, he told us. But there is something noticeably positive about the COP16 conference: For the first time – and other than only last year at the Copenhagen talks – there's unanimous agreement that climate change is real and that humans are responsible for it, he told us.