Most people think that creating cycle lanes is necessary for our modern society, but there are people who have another point of view.
First of all, cycle lanes would decrease air pollutions, because bicycles don't need gasoline to work and cars do. Secondly, if car drivers used a bicycle instead of a car sometimes, traffic congestions wouldn't be such a problem.
On the other hand, using bicycle lanes is harmful for our health and it can provoke different diseases as asthma, because air is more dirty close to a road. Moreover, being near the actual road is quite dangerous, because not all car drivers obey the rules and it can cause traumas.
All in all, I think that the bicycle lanes would be useful and the government should think about it.