Latex balloons are produced from the milky sap of the rubber tree, Hevea brasilliensis.
 The rubber tree originated in the tropical forests of South America and was taken to Europe from Brazil. It is now grown on plantations in many tropical countries. The latex is collected in buckets, as it drips from harmless cuts in the bark. The process is much like that used to collect maple syrup. The use of latex balloons and other products, such as surgical gloves, make rubber trees economically valuable, which discourages people from cutting them down.
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