1.   The fire spread when burning gasoline trickled from the car toward other vehicles.

2.   Carbon dioxide is produced in large quantities when gasoline is burned in an internal combustion engine.

3.   Ethanol engines can burn pure gasoline too.

4.   Some greenhouse gases are naturally occurring, such as carbon dioxide, but increase in the environment when we burn gasoline in cars, for example, or wood.

5.   The government counts these vehicles as getting roughly triple the fuel economy that they achieve when burning gasoline.

6.   When cars burn gasoline they emit nitrous oxide and a class of chemicals called volatile organic compounds.

7.   Cleaner burning reformulated gasoline is required in one-third of the country, in heavily polluted urban areas.