Sulfate-reducing microorganisms are responsible for the sulfurous odors of salt marshes and mud flats. Much of the hydrogen sulfide will react with metal ions in the water to produce metal sulfides. These metal sulfides, such as ferrous sulfide (FeS), are insoluble and often black or brown, leading to the dark color of sludge.
The largest aircraft used for a scheduled domestic service in the USA that is a DOMESTIC route only, is the Boeing 777, though the most common is a Boeing 757 and 767. Some airlines use larger aircraft on domestic legs on an international flight throughout the USA, which do include the 747, however some airlines don't have a license to carry domestic passengers on those routes.
To get a sense of the Airbus A380âs size and ambition, walk up the grand staircase of an Emirates version of the aircraft, past the showers and the first-class suites and then through endless rows in business class to the bar at the back of the upper deck. Big Customer for a Big Plane. The Airbus A380 is the worldâs largest passenger jet, with a wingspan much wider than that of Boeingâs 747-400. The biggest customer for the A380 is Emirates, based in Dubai. As yet, though, there have been no orders for the plane from North or South America.