Airlines Fretting Over New Fuel Laws

Meanwhile, since 2003, American(AMR Quote) has increased its flying by about 22%, yet its greenhouse gas emissions are virtually unchanged, a sign of vastly increased fuel efficiency. The carrier plans another 30% increase in efficiency by 2020. It now publicly discloses its greenhouse gas figures.

At Delta(DAL Quote), conservation initiatives, including single-engine taxi, reduced aircraft weights and improved flight routings, saved more than 25 million gallons of fuel in 2006 alone.

United's(UAUA Quote) ongoing conservation efforts have meant a 34% drop in fuel use per passenger mile since 1990.