Airliner
Airliners, or jet-propelled planes, differ from light planes not only in size but also in speed and equipment. They are designed to carry a greater number of people over longer flight without stopping to refuel.
A passenger airliner has a comfortable seats with soft carpets, adjustable upholstered safety belts, washrooms, and individual Air vents and reading lights. It has a cabin for preparing food. Many airlines offer seats, or economy class service, which costs less than first-class travel.
The cruising speed, of four-engine airliners range from about 350 mph for propeller-driven planes to more than 500 mph for jet-propelled planes.
The crew of an airliner works as a team to make the trip smooth and pleasant. While the passengers take their seats, the pilot or captain, co-pilot, flight engineer, and stewardesses prepare the plane for take-off . The pilot, assisted by the co-pilot, checks the instruments and tests the controls. The flight engineer checks the other mechanical equipment. The stewardesses check the passenger list, make sure that the passengers fasten their belts for safety . Later, the stewardesses distribute magazines, serve meals, and do other things to make the passenger enjoyable.
Environmental problems have become one of the most urgent problems of modern society. More and more people suffer from air and water pollution. Nature also suffers from land and nuclear pollution. The reasons for such environmental problems are numerous.
Among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. All these problems mainly arise due to human careless activities and gradually destroy our planet. If we look closely, we’ll notice that not only one city is under danger, but the majority of world population
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