The article discusses the potential for UV skin damage from sunlight filtering through car and home windows. Key points include: - UVB rays, which cause sunburn, are completely blocked by standard glass used in buildings and cars. - UVA rays, however, can penetrate regular glass and are known to cause skin damage and increase cancer risk. - Windshields (typically laminated glass) block around 98% of UVA radiation, while side and rear windows often do not, raising concerns for skin exposure during long drives. - Tinted windows can reduce UV exposure but also create visibility issues for pedestrians and cyclists, emphasizing the need for caution. - Alternatives like UV-blocking films are available to enhance protection against harmful rays without compromising visibility. This information highlights the importance of considering both UVA and UVB exposure while driving or spending time indoors, along with practical solutions like window films.