Biking is now considered a way of exercising the body. Cycling your way in and about town, sweating keeps the body fit in so many ways. But the problem is; most of the places now are polluted and dusty. Bikers are commonly seen with more than bicycle goggles. Some of them even wear masks!
Well, of course, masks only apply for city bikers, most of the time; bikers now carry their bikes and go to the mountain. They try to conquer rough terrains but with fresh air rather than that of cemented but polluted streets in the city.