The Breathing Earth Simulation is a very nice real-time simulation that display on a map the CO2 emissions, birth and death rates, by country.
You can see the earth breathing.
The counter in the bottom right corner is impressive : it shows the cumulative number of death and born people sicnce you open the page.
When you go to every country, you can have the detail statisitcs for this country.
A very nice way to present and help people to "feel" key numbers.