"Boil down the IPCC report and here's what you find: Climate change is real, it's happening now, human beings are the cause of this transformation, and only action by human beings can save the world from its worst impacts. This isn't a run of the mill report to be dumped in a filing cabinet. This isn't a political document produced by politicians. It's science.
"It builds on the most authoritative assessments of knowledge on climate change produced by scientists, who by profession are conservative because they must deal in what is observable, provable and reviewable by their peers. If this isn't an alarm bell, then I don't know what one is. If ever there were an issue that demanded greater cooperation, partnership, and committed diplomacy, this is it.
"What one country does impacts the livelihoods of people elsewhere -- and what we all do to address climate change now will largely determine the kind of planet we leave for our children and grandchildren. With those stakes, the response must be all hands on deck. It's not about one country making a demand of another. It's the science itself, demanding action from all of us. The United States is deeply committed to leading on climate change. We will work with our partners around the world through ambitious actions to reduce emissions, transform our energy economy, and help the most vulnerable cope with the effects of climate change. We do so because this is science, these are facts, and action is our only option.
World Meteorological Organization (WMO) Secretary-General Michel Jarraud commented saying, "Multiple lines of evidence confirm that the extra heat being trapped by greenhouse gases is warming the Earth's surface to record levels, heating the oceans, raising sea levels, melting ice caps and glaciers, and changing weather patterns and extremes. The IPCC report demonstrates that we must greatly reduce global emissions in order to avoid the worst effects of climate change. It also contains important new scientific knowledge that can be used to produce actionable climate information and services for assisting society to adapt to the impacts of climate change."
UN Under Secretary General and UNEP Executive Director Achim Steiner said, "Climate change is a long term challenge but one that requires urgent action, not tomorrow but today and right now, given the pace and the scale by which greenhouse gases are accumulating in the atmosphere and the rising risks of a more than 2 degree C temperature rise. For those who want to focus on the scientific question marks, that is their right do so. But today we need to focus on the fundamentals and on the actions. Otherwise the risks we run will get higher with every year."
"A universal new UN climate agreement by 2015 is critical, backed by supportive voluntary initiatives such as those managing down short-lived climate pollutants like black carbon. As work under the inclusive Green Economy shows, the benefits of a transition to a low carbon future are multiple from improved public health, food security and job generation to combating climate change now and for future generations."