50: number of years before the world's oil supply is estimated to run dry.
1 million: dollar amount in sales of gas/electric hybrid cars in 2000.1
3.5 billion: dollar amount in estimated sales of hybrids in 2005.1
0: dollar amount in sales of hydrogen fuel-cell engines in 2000.1
4.2 billion: dollar amount in estimated sales of fuel-cell engines in 2005.2
40: percentage reduction of greenhouse gas emissions with a hydrogen fuel cell compared with an internal combustion engine.3
23: highway miles per gallon of a Dodge Caravan minivan.4
68: highway miles per gallon of a gas/electric hybrid Honda Insight.4
42: gallons of gas in a barrel of oil.
25: barrels of oil used each year by the average American driver.5
3: miles per gallon increase it would take in every SUV and light truck to cut U.S. oil consumption by 426,000,000 barrels per year.5
620 million: number of barrels of oil imported into the United States from Saudi Arabia in 2001.
18.6 billion: annual dollar amount it costs to import the oil from Saudi Arabia, based on $30 a barrel.
430 billion: dollar amount the United States has saved since 1970 in energy-efficiency gains.6
4.1 billion: dollar amount it would take to convert 10 percent of U.S. gas stations to hydrogen.7
1. Business Communications Co. Inc.
2. Adams, Harkness & Hill, a Boston-based investment bank
3. H2Gen Innovations Inc., Alexandria, Va.
5. Warren Leon, PhD, coauthor of the Consumer's Guide to Effective Environmental Choices (Crown Publishing, 1999)
6. Energy Information Administration, a division of the U.S. Department of Energy
7. Directed Technologies Inc.