Raising fuel-efficiency standards for SUVs would be of more help in the fight against global warming than reducing power plant emissions or increasing energy efficiency in homes and offices, says the Sierra Club. The group launched a nationwide campaign over the weekend to draw attention to what it says are the evils of SUVs, such as the fun factoid that switching from an average car to a 13-mile-per-gallon SUV for a year would waste more energy than leaving a refrigerator door open for six years or a TV turned on for 28 years.