to imran salam app apnay dost say kahain kay wo sunblock lagaya kurain kisi achi company ka balkey hum sub ko sunblock/sun screen use kurni chaiye din kay time chaiey ap bahir jaien ya na jaien kyoon kay sunblock uv light jo kay sun main say nikalti hain un ko filter kurta hai or skin ko pollution say bhi protect kurta hai jub goray log sunbath laitay hai to baz logon ko sunburn hojata hai yani kai un ki skin brown colour kay nishan hojatey hain or un kay colour main iss liye farq nahin ata kyoonkay un ki skin ka colour pukka hota hai waisay bhi sun say nikalnay wali rays bohat dangerous hoti hai
UV-A cause tanning whn skin is exposed to the sun
UV-B causes damage such as sunburn and skin cancer
and third 1 is UV-C which does nt reach the suface of earth coz its filterd out by the atmosphere
so i will say ask ur friend to use sunblock |