Top 20 Rank: 16
The handful of companies that have consistently won the applause of their peers have adapted to the changing environment in ways that Darwin never dreamed of, and they plan to keep it up. UPS is a prime example: It has a fleet of about 1,550 alternative-fuel delivery trucks, including 50 new-generation hybrid-electric vehicles that will cut fuel consumption by 44,000 gallons a year.More: See how UPS rates in 8 key areas.
