Of all the impacts of climate change, one stands out for its inexorable menace, writes Pete Dolack: rising oceans. And it's not just for distant future generations to deal with: new scientific studies show that people alive today may face 6-9 metres of sea level rise flooding well over a million sq.km including many of the world's biggest cities. So where's the emergency response?There is a possibility, a real danger, that we will hand young people and future generations a climate system that is practically out of their control. We have a global emergency.When it comes to global warming, what else don't we know?