õhupallid

Õhupallid, also known as balloons, are flexible bags that can be inflated with a gas, such as air, helium, or hydrogen. They are typically made of rubber, latex, nylon fabric, or a plastic film. The concept of a balloon has existed for centuries, with early examples being animal bladders filled with air. Modern balloons, particularly those made of rubber, became popular in the 19th century.

The primary use of balloons is for decoration and celebration. They are commonly seen at parties, festivals, and public events, adding a festive atmosphere. Their ability to float, when filled with a gas lighter than air like helium, makes them particularly popular for events where a sense of wonder or festivity is desired. Balloons can also be used for scientific purposes, such as meteorological balloons that carry instruments into the atmosphere to collect data. In some historical contexts, balloons were also used for lighter-than-air flight.

The production of balloons involves molding or sealing the material into the desired shape and size. The type of gas used for inflation impacts the balloon's properties, with helium being a common choice for its inertness and buoyancy. While generally considered safe, certain precautions should be taken, especially concerning small children and potential choking hazards. The environmental impact of balloons, particularly those made from non-biodegradable materials, is also a subject of discussion and concern.