We commonly think of our children and grandchildren [in order] to appreciate the consequences of our present actions but as our present emissions of fossil fuel will continue to affect the atmosphere for over 100,000 years, we should appreciate [that] the decisions on climate policies today will affect the next 5,000 generations of humanity and beyond.
Alas, if we don't turn this climate change emergency around fast (via some Obamaesque miracle? some compassion and emotion in the negotiating halls in Copenhagen? someone winning Richard Branson's $25 million prize for a technology that sucks CO2 out of the atmosphere?), there will, within a lot fewer than 5,000 generations, be no future generations of human beings.
The jellyfish, I hear, however, will do just fine when we're gone. Until it gets too hot for them, too.