However, the recommended humidity level is between 30% and 50%. During the winter months, humidity levels are low (sometimes very low). However, these levels skyrocket during the summer months. The high humidity during the summer reduces the rate of evaporation of moisture from our bodies.
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Natural rubber is made from the sap of a tree, and synthetic rubber is created from chemicals found in petroleum. Rubber trees first originated in South America, and the sap is called latex. The latex oozes from the bark of the rubber tree and can be easily collected to form balls or other objects. Continue Reading.