What would it take for millions of Americans to make the switch from traditional gasoline-powered cars to natural gas vehicles (NGVs)? In what seems like a replay of a bad 1970s movie with high oil prices, prominent energy security risks and fluctuating emissions and regulations - Americans are looking for alternatives to gasoline. EARTH magazine put NGVs to the test in the November issue. Author Castlen Kennedy buckled up for the ride of her life as she and some of her colleagues conducted a 10-day, 4,200-kilometer-long, cross-country trip in a natural gas powered SUV to gain firsthand exposure to the benefits and downfalls of natural gas vehicles.