Most professional plumbers today employ sophisticated methods and equipment to unclog blocked drains. And all of these are mostly environmentally-friendly. All of the staff are trained in using the different equipment. More importantly all of the staff receive training in how to identify the cause and extent of the blockage and how to know which is the best equipment for different types of blockages.
When you call a professional plumber for a clogged drain, they will first examine the area thoroughly and after determining the cause of the blockage and the treatment that is required, they will give you an estimate for the work that needs to be done. If you approve, they will go ahead and use the appropriate method to clear the drain.
Using the proper equipment to first establish the extent of the blockage and then to clear it means that you can be sure that the job done will be thorough and will remain clear for a longer time.
In fact, it is a good idea to always have the contact details of your neighborhood plumber so you can get a hold of them at short notice when the water starts to back up in your kitchen or bathroom. At times like these, the last thing you want to spend time on is searching for the contact details of the plumber while the water is backing up.