2,421: Amount in grams of carbon contained in a gallon of gasoline. Diesel carbon content per gallon is 2,778 grams.

19.4: Amount in pounds of carbon dioxide emissions from a gallon of gasoline. A gallon of diesel emits 22.2 pounds of carbon dioxide.

12: Number of times that the ?Tour of the Fireflies? has been held. The event is an annual critical mass ride that promotes the bicycle as an alternative and environmentally sensible means of transportation that will help keep the air clean and make it firefly-friendly once again.

15 million: Estimated number of Filipinos who participated in this year?s Earth Hour.

P3M: Estimated savings in electricity as a result of last year?s Earth Hour, when the Philippines ranked first among the 88 nations that joined the event. Around 611 megawatts of power was also saved as a result.

7-23: Predicted rise in inches of sea levels by the end of the century due to global warming

40: Percentage decrease in arctic ice thickness since the 1960s due to global warming. According to estimates from the National Aeronautics and Space Administration, the polar ice cap is melting at the rate of nine percent per decade.

97: Predicted percentage of the world?s coral reefs that would be wiped out with a 3.6-degree Fahrenheit increase in temperature, according to scientists.

Compiled by Schatzi Quodala, Inquirer Research
Sources: epa.gov, nationalgeographic.com, ipcc.ch, nrdc.org, PDI Archives