And unlike global warming, for which imaginative last-ditch "geo-engineering" efforts have been dreamed up, such as launching thousands of heat-reflecting mirrors into space, no one seems to have even imagined a way, however wild or complex, that the vast oceans might have their acidity reduced by some extraordinary "ocean-engineering."
Sobering science-based news also came from another jammed gathering in a nearby meeting room in which former Vice President Al Gore, the foreign ministers of both Denmark and Norway, and the premier of Greenland were making a presentation.
They told of new studies that now estimate the enormous Arctic Ocean, which covers the top of the planet, has a 75 percent chance of being completely ice free due to human-induced global warming in the next five to seven years.
Three years ago, most scientists estimated that wouldn't happen for another 50 to 100 years at least.
The Bella Center is a constantly swirling small city from dawn to midnight, populated by delegates from 192 nations, journalists from all corners of the earth and countless members of climate-related NGOs.
The start of the second and final week of the climate summit has brought a surge of thousands of new arrivals -- journalists and representatives of NGOs from around the world -- so large that the Danish organizers have been caught off-guard.
One of America's most prolific journalists specializing in climate change, Seth Borenstein of The Associated Press, was kept waiting outside with hundreds of his colleagues "for seven hours and 20 minutes," he told ABC News late in the afternoon, after he finally got in past security.
It appears that, even with years of preparation, the Danish and U.N. organizers of the climate summit could not foresee the growing concern worldwide that would build with scientists' new findings in 2009 of global warming's accelerating advance.
Underscoring those findings, and the source of his phrasing about the urgency, Chu ended his presentation with a quote from fellow Nobel laureate Martin Luther King, delivered in New York in 1967, during the Vietnam:
"We are now faced with the fact that tomorrow is today," he quoted from his podium. "We are confronted with the fierce urgency of now. In this unfolding conundrum of life and history, there is such a thing as being too late."