Smog ki kahani
Start <html> <head> <style> h1 {text-align: center;} h1 {font-family: Arial;} </style> <h1 style="color:blue;">SMOG</h1> </head> <body> <hr> <p style="color:maroon;">Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide. In the 1950s a new type of smog, known as Photochemical Smog, was first described.</p> <p style="color:maroon;">Different type of Smog</p> <ul style="color:maroon;"> <li><u>Industrial Smog</u></li> <li><u>Photochemical Smog <ul> <li>Sulfurous Smog</li> <li>White Smog</li> </ul> </u> </li> <li><u>london Smog</u></li> </ul> </body> </htm