2. All versions of the Mercury Montego.
3. All versions of the Ford Freestyle, a six- or seven-passenger vehicle that bridges the gap between sedans and SUVs.
4. All versions of the redesigned Ford Mustang.
5. Most four- and six-cylinder models of the Ford Escape.
6. The Escape Hybrid, full hybrid gas-electric SUV.
7. All models of the Ford Focus powered by the Duratec 20 and Duratec 23 engines.
8. Four-door versions of the Ford Explorer SUV powered by 4.6-liter V-8 engines.
9. Mercury Mountaineer SUVs powered by 4.6-liter V-8 engines.
10. All Ford Taurus sedans and station wagons powered by the 3.0-liter Vulcan V-6 engine.
11. The Mercury Sable, when powered by the 3.0-liter Vulcan V-6 engine.
12. All models of the Ford Crown Victoria designed for retail consumers.
13. The Mercury Grand Marquis.
14. All models of the Lincoln Town Car designed for retail customers. Over 15,000 miles of driving, these vehicles will emit no more than 5.3 pounds of smog-forming pollution, according to the EPA. That's 19.7 pounds less than Tier 2 Bin 10 and 24.8 pounds less than a vehicle certified to the EPA's outgoing Tier 1 standard. The cleanest new Ford model certified to federal standards is the Escape Hybrid, which will emit no more than 3.6 pounds of smog-forming pollution over the same distance. The Tier 2 program is the EPA's effort to simultaneously improve air quality and simplify emissions regulations. Under Tier 2, emissions standards for cars and light trucks converge over a period of years. By 2009, 100 percent of all cars and light trucks must meet the standards. In addition, Tier 2 calls for reduced sulfur levels in gasoline, which will help drive further reductions in vehicle emissions over time. The EPA required manufacturers of cars and light trucks to introduce their first Tier 2-certified vehicles in 2004. In 2005, manufacturers are required to certify 50 percent of their fleet to meet Tier 2 standards. On a corporate basis, 57 percent of Ford North America's vehicles are forecast to meet the standard.