<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2008) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> The windshield (North America) or windscreen (EU and most Commonwealth countries) of an aircraft, car, bus, motorbike or tram is the front window . Modern windshields are generally made of laminated safety glass, a type of treated glass, which consists of two (typically) curved sheets of glass with a plastic layer laminated between them for safety, and are bonded into the window frame . Motorbike windshields are often made of high - impact polycarbonate or acrylic plastic . </P> <P> Windshields protect the vehicle's occupants from wind and flying debris such as dust, insects, and rocks, and provide an aerodynamically formed window towards the front . UV coating may be applied to screen out harmful ultraviolet radiation . However, this is usually unnecessary since most auto windshields are made from laminated safety glass . The majority of UV - B is absorbed by the glass itself, and any remaining UV - B together with most of the UV - A is absorbed by the PVB bonding layer . </P>

State the two types of glass normally used on modern vehicles
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