Some of my colleagues bring their bikes to the office so they can indulge in their passion after office hours. There is a small park near our office where they ride in a triangle-like road. However, it is a business district so you can imagine the vehicles in the triangle road - smoking buses, dust and other pollutants. I sometimes tell them that they get energized by riding but their lungs may be suffering from the pollution. But the guys would just laugh off my words.