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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Synthetic means that the rubber is made from crude oil, which also happens to be another nonrenewable resource. Nevertheless, the other type (natural rubber) can be harnessed from trees (i.e. rubber tree), in which a substance (latex) is then extracted. Although both are polymers, plastic and rubber differ because: 1. Rubber can be considered elastomers, and thatâs why when compared to plastics, they are naturally more elastic. 2. Synthetic rubber is derived from crude oil, whereas synthetic plastic is made of petroleum and natural gas.