Greenhouse car-nations.

Greenhouse Car-Nations

World total of motor vehicles, 2004                        826 million
Total length of road network, United States, kilometers      6.4 million
  (rank = 1)
India (2)                                                    3.3 million
Congo (30)                                                 157 thousand
Number of vehicles per kilometer of road, Hong Kong (1)    287
Qatar (2)                                                  284
United States and El Salvador (tied for 40)                 36
Number of vehicles per square kilometer of populated       197
  land, Japan (1)
Belgium (2)                                                173
United States (14)                                          65
Number of cars per 1,000 people, Lebanon (1)               732
New Zealand (2)                                            613
United States (14)                                         481
India (153)                                                  6
Emissions of C[O.sub.2] from petroleum consumption,
  metric tons, United States (1)                         2,595 million
China (2)                                                  816 million

SOURCES: Vehicle total: Worldwatch Institute, Vital Signs 2006-2007.
Emissions: U.S. Energy Information Administration.
All other data: The Economist, Pocket World in Figures.

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