Answer:
In the late 1840s, John Curtis developed the first commercial spruce tree gum by boiling resin then cutting it into strips that were coated in cornstarch to prevent them from sticking together. By the early 1850s, Curtis had constructed the world's first chewing gum factory, in Portland, Maine.
Modern chewing gum was first developed in the 1860s when chicle was brought from Mexico by the former President, General Antonio Lopez de Santa Anna, to New York, where he gave it to Thomas Adams for use as a rubber substitute.
Step-by-step explanation: